Feldtkeller; Martin

Patent Applications and Registrations

Patent applications and USPTO patent grants for Feldtkeller; Martin.The latest application filed is for "method for driving an electronic switch in a power converter circuit and control circuit".

Company Profile

6.121.95

Feldtkeller; Martin - Munich DE
FELDTKELLER; Martin - Muenchen DE
Feldtkeller; Martin - Munchen DE
Feldtkeller; Martin - Menchen DE

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Power converter and method for driving an electronic switch Grant 11,228,242 - Feldtkeller January 18, 2	2022-01-18
Method For Driving An Electronic Switch In A Power Converter Circuit And Control Circuit App 20210384814 - FELDTKELLER; Martin	2021-12-09
Method for driving an electronic switch in a power converter circuit and control circuit Grant 11,128,211 - Feldtkeller September 21, 2	2021-09-21
Method For Driving An Electronic Switch In A Power Converter Circuit And Control Circuit App 20210006147 - Feldtkeller; Martin	2021-01-07
Power Converter And Method For Driving An Electronic Switch App 20200412232 - FELDTKELLER; Martin	2020-12-31
Method For Driving A Switch In A Power Converter, Drive Circuit And Power Converter App 20200382005 - Feldtkeller; Martin	2020-12-03
Method For Driving An Electronic Switch In A Power Converter Circuit And Power Converter Circuit App 20200321850 - FELDTKELLER; Martin	2020-10-08
Phase controlled discharging of internal capacitive element of power supply circuit Grant 10,707,745 - Feldtkeller , et al.	2020-07-07
Phase shift clock for digital LLC converter Grant 10,374,587 - Feldtkeller	2019-08-06
Controller device for power electronics circuit Grant 10,256,630 - Feldtkeller , et al.	2019-04-09
Phase Controlled Discharging of Internal Capacitive Element of Power Supply Circuit App 20180358890 - Feldtkeller; Martin ; et al.	2018-12-13
Controller Device For Power Electronics Circuit App 20180351357 - Feldtkeller; Martin ; et al.	2018-12-06
Level shifter circuit Grant 10,084,451 - Feldtkeller September 25, 2	2018-09-25
Semiconductor device arrangement with a first semiconductor device and with a plurality of second semiconductor devices Grant 9,972,619 - Weis , et al. May 15, 2	2018-05-15
Control Of Switching Frequency Based On Difference In Phase Relations App 20180123466 - Feldtkeller; Martin	2018-05-03
Control of switching frequency based on difference in phase relations Grant 9,960,693 - Feldtkeller May 1, 2	2018-05-01
Phase Shift Clock For Digital Llc Converter App 20170366175 - Feldtkeller; Martin	2017-12-21
Level Shifter Circuit App 20170359069 - Feldtkeller; Martin	2017-12-14
Phase shift clock for digital LLC converter Grant 9,780,766 - Feldtkeller October 3, 2	2017-10-03
Semiconductor component with regions electrically insulated from one another and method for making a semiconductor component Grant 9,741,601 - Feldtkeller , et al. August 22, 2	2017-08-22
Switching converter with an adjustable transistor component Grant 9,742,277 - Hirler , et al. August 22, 2	2017-08-22
Level shifter circuit Grant 9,654,087 - Feldtkeller May 16, 2	2017-05-16
Method for data transmission Grant 9,602,162 - Feldtkeller March 21, 2	2017-03-21
System and method having a first and a second operating mode for driving an electronic switch Grant 9,602,097 - Feldtkeller March 21, 2	2017-03-21
Method for operating a power factor correction circuit Grant 9,577,513 - Feldtkeller , et al. February 21, 2	2017-02-21
Semiconductor Device Arrangement With A First Semiconductor Device And With A Plurality Of Second Semiconductor Devices App 20160372466 - Weis; Rolf ; et al.	2016-12-22
System and method for providing adaptive dead times for a half bridge circuit Grant 9,473,025 - Feldtkeller October 18, 2	2016-10-18
Current estimation for a converter Grant 9,455,631 - Feldtkeller September 27, 2	2016-09-27
Semiconductor device arrangement with a first semiconductor device and with a plurality of second semiconductor devices Grant 9,431,382 - Weis , et al. August 30, 2	2016-08-30
Voltage regulating circuit Grant 9,377,800 - Feldtkeller June 28, 2	2016-06-28
Runtime compensated oscillator Grant 9,379,691 - Feldtkeller June 28, 2	2016-06-28
Method For Data Transmission App 20160028440 - Feldtkeller; Martin	2016-01-28
Switching Converter with an Adjustable Transistor Component App 20160006353 - Hirler; Franz ; et al.	2016-01-07
Rectifier with Bridge Circuit and Parallel Resonant Circuit App 20150372616 - Feldtkeller; Martin	2015-12-24
Circuit arrangement and method for bidirectional data transmission Grant 9,197,291 - Feldtkeller November 24, 2	2015-11-24
Voltage sensing in a voltage converter Grant 9,197,131 - Feldtkeller November 24, 2	2015-11-24
Circuit configured to adjust the activation state of transistors based on load conditions Grant 9,166,028 - Hirler , et al. October 20, 2	2015-10-20
Rectifier with bridge circuit and parallel resonant circuit Grant 9,130,478 - Feldtkeller September 8, 2	2015-09-08
Methods and systems for a full-bridge voltage converting device Grant 9,124,194 - Feldtkeller September 1, 2	2015-09-01
Semiconductor Device Arrangement with a First Semiconductor Device and with a Plurality of Second Semiconductor Devices App 20150243645 - Weis; Rolf ; et al.	2015-08-27
Protection circuit for protecting a half-bridge circuit Grant 9,083,243 - Feldtkeller , et al. July 14, 2	2015-07-14
Driving an Electronic Switch App 20150123717 - Feldtkeller; Martin	2015-05-07
Voltage Regulating Circuit App 20150123729 - Feldtkeller; Martin	2015-05-07
Voltage regulating circuit Grant 9,019,005 - Feldtkeller April 28, 2	2015-04-28
Current Estimation For A Converter App 20150069990 - FELDTKELLER; Martin	2015-03-12
Semiconductor device arrangement with a first semiconductor device and with a plurality of second semiconductor devices Grant 8,970,262 - Weis , et al. March 3, 2	2015-03-03
Temperature evaluation circuit Grant 8,947,842 - Feldtkeller February 3, 2	2015-02-03
System and method for driving an electronic switch dependent on temperature Grant 8,947,064 - Feldtkeller February 3, 2	2015-02-03
Method For Operating A Power Factor Correction Circuit App 20150015217 - Feldtkeller; Martin ; et al.	2015-01-15
Circuit Arrangement And Method For Bidirectional Data Transmission App 20140369433 - Feldtkeller; Martin	2014-12-18
Power factor correction circuit having multiple switched-mode converter circuits Grant 8,912,775 - Feldtkeller , et al. December 16, 2	2014-12-16
Determining the dead time in driving a half-bridge Grant 8,907,685 - Feldtkeller December 9, 2	2014-12-09
Methods and Systems for Converting a DC-Voltage to an AC-Voltage App 20140355323 - Feldtkeller; Martin	2014-12-04
Runtime Compensated Oscillator App 20140312983 - Feldtkeller; Martin	2014-10-23
Signal transmitting device and phase modulated method for transmitting via a signal transmitting device Grant 8,861,643 - Feldtkeller October 14, 2	2014-10-14
Power transistor with controllable reverse diode Grant 8,853,776 - Hirler , et al. October 7, 2	2014-10-07
System and Method for Providing Adaptive Dead Times App 20140285173 - Feldtkeller; Martin	2014-09-25
Rectifier Circuit App 20140254224 - Feldtkeller; Martin	2014-09-11
Voltage Sensing in a Voltage Converter App 20140211510 - Feldtkeller; Martin	2014-07-31
Runtime compensated oscillator Grant 8,786,375 - Feldtkeller July 22, 2	2014-07-22
Protection Circuit For Protecting A Half-bridge Circuit App 20140159697 - FELDTKELLER; Martin ; et al.	2014-06-12
System and method for providing adaptive dead times Grant 8,749,209 - Feldtkeller June 10, 2	2014-06-10
Signal transmission arrangement with a transformer Grant 8,730,694 - Feldtkeller May 20, 2	2014-05-20
Semiconductor Device Arrangement with a First Semiconductor Device and with a Plurality of Second Semiconductor Devices App 20140062544 - Weis; Rolf ; et al.	2014-03-06
Circuit for determining an average value Grant 8,638,048 - Feldtkeller January 28, 2	2014-01-28
Voltage Regulating Circuit App 20140002185 - Feldtkeller; Martin	2014-01-02
Signal Transmitting Device and Phase Modulated Method for Transmitting via a Signal Transmitting Device App 20130336424 - Feldtkeller; Martin	2013-12-19
Semiconductor device arrangement with a first semiconductor device and with a plurality of second semiconductor devices Grant 8,569,842 - Weis , et al. October 29, 2	2013-10-29
Method for controlling gas discharge lamps Grant 8,525,429 - Schlenk , et al. September 3, 2	2013-09-03
Signal Transmission Arrangement with a Transformer App 20130222040 - Feldtkeller; Martin	2013-08-29
Method for operating a fluorescent lamp Grant 8,497,640 - Feldtkeller July 30, 2	2013-07-30
Determining The Dead Time In Driving A Half-bridge App 20130147497 - Feldtkeller; Martin	2013-06-13
Protection circuit for protecting a half-bridge circuit Grant 8,441,240 - Feldtkeller , et al. May 14, 2	2013-05-14
Signal transmitting device and phase modulated method for transmitting via a signal transmitting device Grant 8,442,128 - Feldtkeller May 14, 2	2013-05-14
Charge pump Grant 8,432,215 - Barrenscheen , et al. April 30, 2	2013-04-30
Method For Operating A Fluorescent Lamp App 20130099695 - Feldtkeller; Martin	2013-04-25
Signal transmission arrangement with a transformer Grant 8,427,852 - Feldtkeller April 23, 2	2013-04-23
Power Transistor With Controllable Reverse Diode App 20130069710 - Hirler; Franz ; et al.	2013-03-21
Driving an Electronic Switch App 20130069612 - Feldtkeller; Martin	2013-03-21
Temperature Evaluation Circuit App 20130057995 - Feldtkeller; Martin	2013-03-07
Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast Grant 8,378,590 - Feldtkeller , et al. February 19, 2	2013-02-19
Determining the dead time in driving a half-bridge Grant 8,378,695 - Feldtkeller February 19, 2	2013-02-19
Method for operating a fluorescent lamp Grant 8,344,640 - Feldtkeller January 1, 2	2013-01-01
Runtime Compensated Oscillator App 20120313720 - Feldtkeller; Martin	2012-12-13
Circuit Arrangement with an Adjustable Transistor Component App 20120306464 - HIRLER; Franz ; et al.	2012-12-06
Circuit For Determining An Average Value App 20120262086 - FELDTKELLER; Martin	2012-10-18
Power Factor Correction Circuit App 20120262958 - Feldtkeller; Martin ; et al.	2012-10-18
Method for driving a fluorescent lamp, and lamp ballast Grant 8,242,702 - Feldtkeller August 14, 2	2012-08-14
Semiconductor Device Arrangement with a First Semiconductor Device and with a Plurality of Second Semiconductor Devices App 20120175635 - Weis; Rolf ; et al.	2012-07-12
Protection Circuit for Protecting a Half-Bridge Circuit App 20120153918 - FELDTKELLER; Martin ; et al.	2012-06-21
System and method for an inductive proximity switch on a common substrate Grant 8,203,335 - Feldtkeller June 19, 2	2012-06-19
Encoding bits into simultaneous pulse pairs Grant 8,184,736 - Feldtkeller May 22, 2	2012-05-22
Charge Pump App 20120075009 - BARRENSCHEEN; Jens ; et al.	2012-03-29
Method for Detection of Non-Zero-Voltage Switching Operation of a Ballast of Fluorescent Lamps, and Ballast App 20120062137 - Feldtkeller; Martin ; et al.	2012-03-15
Protection circuit for protecting a half-bridge circuit Grant 8,125,202 - Feldtkeller , et al. February 28, 2	2012-02-28
Signal Transmission Arrangement with a Transformer App 20110267861 - Feldtkeller; Martin	2011-11-03
Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast Grant 8,022,637 - Feldtkeller , et al. September 20, 2	2011-09-20
Method For Operating A Fluorescent Lamp App 20110215729 - Feldtkeller; Martin	2011-09-08
Method for operating a fluorescent lamp that is connected to a series resonant circuit Grant 7,990,073 - Feldtkeller August 2, 2	2011-08-02
Detection of a load state of a half-bridge Grant 7,982,452 - Feldtkeller July 19, 2	2011-07-19
Switch-mode converter Grant 7,894,218 - Feldtkeller , et al. February 22, 2	2011-02-22
Detection of a load state of a half-bridge App 20110025301 - Feldtkeller; Martin	2011-02-03
Method For Controlling Gas Discharge Lamps App 20100327771 - SCHLENK; Manfred ; et al.	2010-12-30
Determining the dead time in driving a half-bridge App 20100321041 - Feldtkeller; Martin	2010-12-23
Controlling a lamp ballast Grant 7,834,552 - Feldtkeller , et al. November 16, 2	2010-11-16
Signal transmitter and signal transmission apparatus Grant 7,825,764 - Feldtkeller November 2, 2	2010-11-02
Method and apparatus for monitoring the operation of a gas discharge lamp Grant 7,812,612 - Feldtkeller , et al. October 12, 2	2010-10-12
Method for transmitting data and data transmitter Grant 7,792,197 - Feldtkeller September 7, 2	2010-09-07
Switching converter having an activatable and deactivatable damping circuit Grant 7,724,545 - Feldtkeller May 25, 2	2010-05-25
Drive circuit for a switch in a switching converter Grant 7,696,794 - Feldtkeller April 13, 2	2010-04-13
Method for actuation, and actuating circuit for a switch in a power factor correction circuit Grant 7,683,595 - Feldtkeller , et al. March 23, 2	2010-03-23
Method For Driving A Fluorescent Lamp, And Lamp Ballast App 20090284162 - Feldtkeller; Martin	2009-11-19
System and Method for Providing Adaptive Dead Times App 20090273957 - Feldtkeller; Martin	2009-11-05
Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast App 20090256487 - Feldtkeller; Martin ; et al.	2009-10-15
Inductive Proximity Switch App 20090243601 - Feldtkeller; Martin	2009-10-01
Semiconductor Component With Regions Electrically Insulated From One Another And Method For Making A Semiconductor Component App 20090224264 - FELDTKELLER; Martin ; et al.	2009-09-10
Signal transmission arrangement having a transformer and a receiver circuit Grant 7,587,193 - Feldtkeller September 8, 2	2009-09-08
Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast Grant 7,560,873 - Feldtkeller , et al. July 14, 2	2009-07-14
Protection Circuit for Protecting a Half-Bridge Circuit App 20090073729 - FELDTKELLER; Martin ; et al.	2009-03-19
Method for data transmission via a data transmission path with inductive transformers, and a data transmission apparatus Grant 7,492,827 - Feldtkeller February 17, 2	2009-02-17
Controlling a Lamp Ballast App 20090021174 - Feldtkeller; Martin ; et al.	2009-01-22
Component arrangement with a planar transformer Grant 7,474,190 - Strzalkowski , et al. January 6, 2	2009-01-06
Signal transmitter and signal transmission apparatus App 20080290976 - Feldtkeller; Martin	2008-11-27
Method and Apparatus for Monitoring the Operation of a Gas Discharge Lamp App 20080265900 - FELDTKELLER; Martin ; et al.	2008-10-30
Method for actuation, and actuating circuit for a switch in a power factor correction circuit App 20080252268 - Feldtkeller; Martin ; et al.	2008-10-16
Actuating circuit App 20080252269 - Feldtkeller; Martin ; et al.	2008-10-16
Switching converter having an activatable and deactivatable damping circuit App 20080197818 - Feldtkeller; Martin	2008-08-21
Switch-mode Converter App 20080191678 - Feldtkeller; Martin ; et al.	2008-08-14
Method For Operating A Fluorescent Lamp App 20080150442 - Feldtkeller; Martin	2008-06-26
Drive circuit for a fluorescent lamp with a diagnosis circuit, and method for diagnosis of a fluorescent lamp Grant 7,378,807 - Feldtkeller , et al. May 27, 2	2008-05-27
Encoding Bits into Simultaneous Pulse Pairs App 20080080624 - Feldtkeller; Martin	2008-04-03
Method for transmitting data and data transmitter App 20080031379 - Feldtkeller; Martin	2008-02-07
Actuation circuit for a switch in a switch-mode converter for improving the response to sudden changes Grant 7,312,597 - Fahlenkamp , et al. December 25, 2	2007-12-25
Signal transmitting device and phase modulated method for transmitting via a signal transmitting device App 20070274412 - Feldtkeller; Martin	2007-11-29
Method for driving a semiconductor switching element in a half-bridge and circuit arrangement having a half-bridge Grant 7,274,225 - Feldtkeller September 25, 2	2007-09-25
Component arrangement with a planar transformer Grant 7,233,224 - Strzalkowski , et al. June 19, 2	2007-06-19
Component arrangement with a planar transformer App 20070120639 - Strzalkowski; Bernhard ; et al.	2007-05-31
Method for switching driving of a semiconductor switching element Grant 7,180,337 - Feldtkeller February 20, 2	2007-02-20
Signal transmission arrangement having a transformer and a receiver circuit App 20060276155 - Feldtkeller; Martin	2006-12-07
Method for data transmission via a data transmission path with inductive transformers, and a data transmission apparatus App 20060269002 - Feldtkeller; Martin	2006-11-30
Drive circuit for a switch in a switching converter and method for driving a switch in a switching converter Grant 7,135,845 - Zverev , et al. November 14, 2	2006-11-14
Half-bridge circuit and method for driving the half-bridge circuit Grant 7,068,486 - Feldtkeller June 27, 2	2006-06-27
Method for driving a switch in a power factor correction circuit and drive circuit Grant 7,031,173 - Feldtkeller April 18, 2	2006-04-18
Method for operating a switching converter and drive circuit for driving a switch in a switching converter Grant 7,012,819 - Feldtkeller March 14, 2	2006-03-14
Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast App 20060034123 - Feldtkeller; Martin ; et al.	2006-02-16
Drive circuit for a fluorescent lamp with a diagnosis circuit, and method for diagnosis of a fluorescent lamp App 20060033450 - Feldtkeller; Martin ; et al.	2006-02-16
Method for operating a switch in a free-running switch mode power supply, and a drive circuit for a switch in a free-running switch mode power supply Grant 6,999,324 - Feldtkeller February 14, 2	2006-02-14
Component arrangement with a planar transformer App 20060028313 - Strzalkowski; Bernhard ; et al.	2006-02-09
Actuation circuit for a switch in a switch-mode converter for improving the response to sudden changes App 20060031736 - Fahlenkamp; Marc ; et al.	2006-02-09
Method for driving a semiconductor switching element in a half-bridge and circuit arrangement having a half-bridge App 20060022346 - Feldtkeller; Martin	2006-02-02
Method for operating a switching converter and drive circuit for driving a switch in a switching converter App 20050213358 - Feldtkeller, Martin	2005-09-29
Method for driving a switch in a power factor correction circuit and drive circuit App 20050146908 - Feldtkeller, Martin	2005-07-07
Method for switching driving of a semiconductor switching element App 20050104650 - Feldtkeller, Martin	2005-05-19
Circuit configuration having a field-effect transistor operable at higher frequencies Grant 6,858,895 - Feldtkeller , et al. February 22, 2	2005-02-22
Drive circuit for a switch in a switching converter App 20050017764 - Feldtkeller, Martin	2005-01-27
Drive circuit for a switch in a switching converter and method for driving a switch in a switching converter App 20050013076 - Zverev, Ilva ; et al.	2005-01-20
Half-bridge circuit Grant 6,822,399 - Feldtkeller , et al. November 23, 2	2004-11-23
Method for starting up a switched-mode power supply, and switched-mode power supply having a starting circuit Grant 6,757,183 - Feldtkeller , et al. June 29, 2	2004-06-29
Filter configuration, method for filtering an analog filter input signal, and power factor controller Grant 6,753,798 - Feldtkeller June 22, 2	2004-06-22
Method for driving a switch in a switch-mode converter, and a drive circuit for driving a switch Grant 6,744,241 - Feldtkeller June 1, 2	2004-06-01
Switched-mode power supply with a function for detecting a broken feedback loop Grant 6,735,095 - Fahlenkamp , et al. May 11, 2	2004-05-11
Method for operating a switch in a free-running switch mode power supply, and a drive circuit for a switch in a free-running switch mode power supply App 20040057256 - Feldtkeller, Martin	2004-03-25
Method for driving a switch in a switch-mode converter, and a drive circuit for driving a switch App 20030227279 - Feldtkeller, Martin	2003-12-11
Circuit configuration for supplying an electrical consumer and for limiting a time deviation of a switching current of a consumer Grant 6,650,094 - Feldtkeller November 18, 2	2003-11-18
Circuit configuration for applying a supply voltage to a load and method for such application Grant 6,643,144 - Feldtkeller November 4, 2	2003-11-04
Circuit configuration and method for the switch-on/off control of a field-effect transistor App 20030173619 - Feldtkeller, Martin ; et al.	2003-09-18
Filter configuration, method for filtering an analog filter input signal, and power factor controller App 20030172103 - Feldtkeller, Martin	2003-09-11
Switched-mode power supply with a function for detecting a broken feedback loop App 20030117819 - Fahlenkamp, Marc ; et al.	2003-06-26
Half-bridge circuit and method for driving the half-bridge circuit App 20030067728 - Feldtkeller, Martin	2003-04-10
Clocked power supply Grant 6,515,874 - Feldtkeller February 4, 2	2003-02-04
Method for starting up a switched-mode power supply, and switched-mode power supply having a starting circuit App 20030007367 - Feldtkeller, Martin ; et al.	2003-01-09
Circuit configuration for applying a supply voltage to a load and method for such application App 20030001548 - Feldtkeller, Martin	2003-01-02
Clocked power supply App 20020136034 - Feldtkeller, Martin	2002-09-26
Half-bridge circuit App 20020096779 - Feldtkeller, Martin ; et al.	2002-07-25
Circuit configuration for controlling a switching device for switching an electrical consumer and method for limiting a time deviation of a switching current of a consumer App 20010035743 - Feldtkeller, Martin	2001-11-01
Circuit arrangement for a timed power supply Grant 6,310,468 - Feldtkeller October 30, 2	2001-10-30
Power switch with overload protection Grant 6,137,668 - Feldtkeller October 24, 2	2000-10-24
Thermal protection circuit with thermally dependent switching signal Grant 6,128,172 - Feldtkeller October 3, 2	2000-10-03
Circuit configuration for producing a load-independent DC voltage Grant 6,069,470 - Feldtkeller May 30, 2	2000-05-30
Circuit for producing a reference voltage Grant 6,046,578 - Feldtkeller April 4, 2	2000-04-04
System for contactless power and data transmission Grant 5,953,642 - Feldtkeller , et al. September 14, 1	1999-09-14
Circuit configuration for generating a controlled output voltage Grant 5,654,628 - Feldtkeller August 5, 1	1997-08-05
Circuit configuration for limiting the output voltage of a clocked voltage regulator Grant 5,596,264 - Bichler , et al. January 21, 1	1997-01-21
Protective circuit for a power MOSFET that drives an inductive load Grant 5,453,900 - Feldtkeller September 26, 1	1995-09-26
Starting circuit for a switching power supply having switching means responsive to a shutoff command Grant 5,083,254 - Feldtkeller January 21, 1	1992-01-21
Blocking oscillator switching power supply with transformer demagnetization monitor circuit Grant 5,075,837 - Feldtkeller December 24, 1	1991-12-24
Circuit configuration for a blocking oscillator converter switching power supply Grant 5,072,353 - Feldtkeller December 10, 1	1991-12-10
Circuit configuration for a fixed-frequency blocking oscillator converter switching power supply Grant 5,034,873 - Feldtkeller July 23, 1	1991-07-23
Base current regulation circuit for a switching transistor, in particular a bipolar transistor Grant 5,017,802 - Feldtkeller May 21, 1	1991-05-21
Method and circuit for limiting the output current of a flyback converter Grant 4,908,755 - Feldtkeller March 13, 1	1990-03-13