| Patent | Date |
|---|
Integratable D/A converter
Grant 4,521,762 - Kapral June 4, 1 | 1985-06-04 |
Method of measuring splice loss in optical fibers
Grant 4,391,517 - Zucker , et al. * July 5, 1 | 1983-07-05 |
Dual rail time and control unit for a T-S-T-digital switching system
Grant 4,392,223 - Simmons , et al. July 5, 1 | 1983-07-05 |
Error rate detector
Grant 4,385,383 - Karchevski May 24, 1 | 1983-05-24 |
Simulation circuit employing switched capacitors
Grant 4,383,305 - Lee May 10, 1 | 1983-05-10 |
Power supply control circuit for subscriber carrier telephone system
Grant 4,380,687 - Stewart April 19, 1 | 1983-04-19 |
Switched-capacitor source resistor simulation circuit
Grant 4,375,625 - Lee March 1, 1 | 1983-03-01 |
Method of splicing ends of optical fibers
Grant 4,372,768 - Zucker , et al. February 8, 1 | 1983-02-08 |
Switched-capacitor source resistor simulation circuit
Grant 4,354,250 - Lee October 12, 1 | 1982-10-12 |
RF Trap for a cable television trunk amplifier station
Grant 4,349,795 - Kwok September 14, 1 | 1982-09-14 |
Switched-capacitor floating-inductor simulation circuit
Grant 4,333,157 - Lee June 1, 1 | 1982-06-01 |
Switched-capacitor resistor simulation circuits
Grant 4,331,944 - Lee May 25, 1 | 1982-05-25 |
Apparatus protecting a lens from airborne particulates
Grant 4,315,133 - Morgan , et al. February 9, 1 | 1982-02-09 |
Method of screening paste solder onto leaded hybrid substrates
Grant 4,311,267 - Lim January 19, 1 | 1982-01-19 |
DC-to-DC Converter with reduced power loss during turn off
Grant 4,312,029 - Zellmer January 19, 1 | 1982-01-19 |
Method and apparatus protecting a lens from airborne particulates
Grant 4,303,824 - Morgan , et al. December 1, 1 | 1981-12-01 |
Current sensing circuit for power supply with series control transistor
Grant 4,278,930 - Rogers July 14, 1 | 1981-07-14 |
Interrupt expander circuit
Grant 4,275,458 - Khera June 23, 1 | 1981-06-23 |
Multiport conference circuit with multi-frame summing and voice level coding
Grant 4,274,155 - Funderburk , et al. June 16, 1 | 1981-06-16 |
Arrangement for mounting dual-in-line packaged integrated circuits to thick/thin film circuits
Grant 4,272,140 - Lychyk , et al. June 9, 1 | 1981-06-09 |
Digitally activated ringing circuit for generation of AC voltages
Grant 4,270,028 - Young May 26, 1 | 1981-05-26 |
Key telephone exclusion circuit
Grant 4,266,103 - White May 5, 1 | 1981-05-05 |
Current limiter for switched DC-to-DC converter
Grant 4,263,644 - Zellmer April 21, 1 | 1981-04-21 |
Self-starting carrier subscriber power supply
Grant 4,263,645 - Zellmer April 21, 1 | 1981-04-21 |
Multiport conference circuit with multi-frame summing
Grant 4,257,120 - Funderburk , et al. March 17, 1 | 1981-03-17 |
Call processing monitor system
Grant 4,255,624 - Walton , et al. March 10, 1 | 1981-03-10 |
Call processing monitor system
Grant 4,255,625 - Walton , et al. March 10, 1 | 1981-03-10 |
Digital intercept recorder/announcer system
Grant 4,255,618 - Danner , et al. March 10, 1 | 1981-03-10 |
Multiport conference circuit with voice level coding
Grant 4,254,497 - Funderburk , et al. March 3, 1 | 1981-03-03 |
Interlock control of asynchronous data transmission between a host processor and a plurality of microprocessors through a common buffer
Grant 4,244,018 - Mui January 6, 1 | 1981-01-06 |
Construction of a printed wiring card mountable reed relay
Grant 4,243,963 - Jameel , et al. January 6, 1 | 1981-01-06 |
Ringing signal generator
Grant 4,239,941 - Gauthier , et al. December 16, 1 | 1980-12-16 |
Method and apparatus for generating timing phase error signals in PSK demodulators
Grant 4,234,957 - Tracey , et al. November 18, 1 | 1980-11-18 |
Error density detector
Grant 4,234,953 - Kline November 18, 1 | 1980-11-18 |
Dial pulse sensor and repeater circuit
Grant 4,230,912 - Lee , et al. October 28, 1 | 1980-10-28 |
Programmable power supply system
Grant 4,229,665 - Tiedt October 21, 1 | 1980-10-21 |
Titanium nitride as one layer of a multi-layered coating intended to be etched
Grant 4,226,932 - Ferraris October 7, 1 | 1980-10-07 |
Automatic remote operate circuit
Grant 4,219,697 - Reynolds August 26, 1 | 1980-08-26 |
Tray for holding components with preformed leads
Grant 4,210,243 - McDowell July 1, 1 | 1980-07-01 |
Housing for a telephone instrument base
Grant D255,570 - Janda June 24, 1 | 1980-06-24 |
Insulated electrical conductor locking arrangement and method
Grant 4,209,218 - Kosten , et al. June 24, 1 | 1980-06-24 |
Method and apparatus of controlling bias voltage in regulating amplifiers
Grant 4,205,275 - Blackburn May 27, 1 | 1980-05-27 |
Private automatic branch exchange telephone system with two data sources sharing a multiplexed data bus
Grant 4,201,893 - McLaughlin May 6, 1 | 1980-05-06 |
Ringing voltage transfer circuit
Grant 4,201,897 - Dorth , et al. May 6, 1 | 1980-05-06 |
Telephone subscriber's loop power control circuit
Grant 4,197,432 - Tiedt April 8, 1 | 1980-04-08 |
Apparatus for separating snapstrates into individual hybrid substrates
Grant 4,195,758 - Morgan April 1, 1 | 1980-04-01 |
Flat ribbon cable retainer
Grant 4,192,965 - Baum March 11, 1 | 1980-03-11 |
Housing for a telephone set
Grant D254,435 - Ferron March 11, 1 | 1980-03-11 |
Pushbutton call transmitter
Grant 4,192,976 - Scott March 11, 1 | 1980-03-11 |
Digital trunk supervisory decoder multiplexor for ground start or E&M signalling on a common T1 span
Grant 4,191,857 - McLaughlin , et al. March 4, 1 | 1980-03-04 |
Loop, dial pulse and ring trip detection circuit with capacitive shunt network
Grant 4,191,859 - Sabon March 4, 1 | 1980-03-04 |
Call for service and continuity sensor circuit
Grant 4,190,745 - Jusinskas, Jr. , et al. February 26, 1 | 1980-02-26 |
Telephone stand
Grant D254,200 - Janda February 12, 1 | 1980-02-12 |
Telephone hookswitch actuator and handset support assembly
Grant 4,188,512 - Lord February 12, 1 | 1980-02-12 |
Direct memory access expander unit for use with a microprocessor
Grant 4,180,855 - Buedel December 25, 1 | 1979-12-25 |
Multiport conference circuit
Grant 4,175,215 - McLaughlin , et al. November 20, 1 | 1979-11-20 |
Digital coin circuit
Grant 4,174,468 - Stelte November 13, 1 | 1979-11-13 |
Apparatus and method for remote testing of a loop transmission path
Grant 4,170,722 - Blackburn October 9, 1 | 1979-10-09 |
8-Phase PSK modulator
Grant 4,168,397 - Bradley September 18, 1 | 1979-09-18 |
Retaining means for securing a biasing magnet in a reed relay switching assembly
Grant 4,156,218 - Koppensteiner May 22, 1 | 1979-05-22 |
Ringer power generator circuit for carrier subscriber station terminal
Grant 4,152,546 - Stewart May 1, 1 | 1979-05-01 |
Power supply control circuit for subscriber carrier telephone system
Grant 4,145,572 - Stewart March 20, 1 | 1979-03-20 |
Nonuniform translation between analog and digital signals by a piece-wise linear process
Grant 4,143,363 - Dotter, Jr. March 6, 1 | 1979-03-06 |
AC supervisory signal detector circuit
Grant 4,133,982 - Lee , et al. January 9, 1 | 1979-01-09 |
3-Port conference circuit for use in private automatic branch exchange
Grant 4,126,766 - McLaughlin , et al. November 21, 1 | 1978-11-21 |
Detector circuit for sensing battery polarity and loop closure
Grant 4,126,765 - Calder , et al. November 21, 1 | 1978-11-21 |
Phase locked loop including active lowpass filter
Grant 4,118,674 - Ball October 3, 1 | 1978-10-03 |
Error correction for signals employing the modified duobinary code
Grant 4,118,686 - Lender October 3, 1 | 1978-10-03 |
Chassis formed of sheet stock
Grant 4,116,510 - Franco September 26, 1 | 1978-09-26 |
Modified duobinary regenerative repeater testing arrangement
Grant 4,112,263 - Lender September 5, 1 | 1978-09-05 |
Apparatus and method for detecting errors in a 7-level correlative signal
Grant 4,110,691 - Lender August 29, 1 | 1978-08-29 |
Circuit card connector and support device
Grant 4,109,300 - Reimer August 22, 1 | 1978-08-22 |
Dual coil hinged bobbin assembly
Grant 4,103,268 - Anders , et al. July 25, 1 | 1978-07-25 |
Support for hybrid substrate carrying electrical circuit patterns and elements
Grant 4,089,042 - Torburn May 9, 1 | 1978-05-09 |
Error detector for modified duobinary signals
Grant 4,086,566 - Lender April 25, 1 | 1978-04-25 |
Apparatus and method for generating a high-accuracy 7-level correlative signal
Grant 4,086,587 - Lender April 25, 1 | 1978-04-25 |
Low insertion force connector
Grant 4,084,874 - Georgopulos April 18, 1 | 1978-04-18 |
Error density detector
Grant 4,080,589 - Kline March 21, 1 | 1978-03-21 |
Modified duobinary repeatered span line
Grant 4,078,159 - Lender , et al. March 7, 1 | 1978-03-07 |
Method and apparatus for regenerating a modified duobinary signal
Grant 4,078,157 - Lender , et al. March 7, 1 | 1978-03-07 |
Pluggable protector holder for surge arrestor gas tubes
Grant 4,071,876 - Benson , et al. January 31, 1 | 1978-01-31 |
Lamp cap for use with indicating light assembly
Grant 4,070,568 - Gala January 24, 1 | 1978-01-24 |
Frequency stabilized microwave signal source
Grant 4,068,173 - Weise January 10, 1 | 1978-01-10 |
Printed wiring card mountable reed relay
Grant 4,063,205 - Miknaitis December 13, 1 | 1977-12-13 |
PCM tone receiver using optimum statistical technique
Grant RE29,460 - Mills October 25, 1 | 1977-10-25 |
Data buffer
Grant 4,054,747 - Pachynski, Jr. October 18, 1 | 1977-10-18 |
Variable message recorder employing single tape loop having fast reset
Grant 4,054,924 - Zimmermann October 18, 1 | 1977-10-18 |
Conference circuit for pulse coded modulated telephony
Grant 4,054,755 - Lee , et al. October 18, 1 | 1977-10-18 |
Receive amplifier for PAM signals
Grant 4,053,797 - Tosuntikool , et al. October 11, 1 | 1977-10-11 |
Ring detector circuit for centrally located answering and recording equipment
Grant 4,049,916 - Danner September 20, 1 | 1977-09-20 |
Remote access for centrally located answering and recording equipment
Grant 4,049,915 - Danner September 20, 1 | 1977-09-20 |
Mounting arrangement for electrical components and electrical component cases adapted to be used therewith
Grant 4,049,227 - Georgopulos September 20, 1 | 1977-09-20 |
Communication system trunk circuit
Grant 4,049,919 - Young September 20, 1 | 1977-09-20 |
Transistor amplifier stage with selectively adjustable gain control circuit
Grant 4,048,576 - Blackburn , et al. September 13, 1 | 1977-09-13 |
Analog-to-digital converter using common circuitry for sample-and-hold and integrating functions
Grant 4,041,484 - Boleda , et al. August 9, 1 | 1977-08-09 |
Stabilized locking mechanism for threaded tuning screws in waveguides
Grant 4,041,421 - Owlett August 9, 1 | 1977-08-09 |
Nonfrequency-converting microwave radio repeater using a low power consumption amplifier
Grant 4,041,389 - Oades August 9, 1 | 1977-08-09 |
Control of leakage currents in a switching matrix
Grant 4,035,773 - Kohout , et al. July 12, 1 | 1977-07-12 |
Super compensated voltage control of redundant D.C. power supplies
Grant 4,035,716 - Hutchinson July 12, 1 | 1977-07-12 |
Conferencing arrangement for use in a PCM system
Grant 4,031,328 - Pitroda June 21, 1 | 1977-06-21 |
Direct current compensation circuit with current threshold detection
Grant 4,027,235 - Macrander , et al. May 31, 1 | 1977-05-31 |
Line equalizer with differentially controlled complementary constant resistance networks
Grant 4,027,259 - Zellmer May 31, 1 | 1977-05-31 |
Digital bit rate converter
Grant 4,025,720 - Pachynski, Jr. May 24, 1 | 1977-05-24 |
Conference circuit for pulse coded modulated telephony
Grant 4,022,981 - McLaughlin , et al. May 10, 1 | 1977-05-10 |
Method and apparatus for protecting memory storage location accesses
Grant 4,017,840 - Schild , et al. April 12, 1 | 1977-04-12 |
Unmatched field effect transistors providing matched voltage-controlled resistances
Grant 4,016,481 - Bradley April 5, 1 | 1977-04-05 |
Resistive pad with bridging resistor
Grant 4,012,688 - Blackburn , et al. March 15, 1 | 1977-03-15 |
Chime generating circuit
Grant 4,012,702 - Weber March 15, 1 | 1977-03-15 |
Switching and transmission technique using a method and arrangement of channel allocation for providing conferencing
Grant 4,007,338 - McLaughlin February 8, 1 | 1977-02-08 |
Automatic call transmitter of the dual tone multifrequency type
Grant 4,007,333 - Marheine February 8, 1 | 1977-02-08 |
Foreign potential checker
Grant 4,006,319 - Gartner February 1, 1 | 1977-02-01 |
Time divided switching and concentration apparatus
Grant 3,997,874 - Kelly , et al. December 14, 1 | 1976-12-14 |
Digital time-division multiplexing system
Grant 3,995,119 - Pachynski, Jr. November 30, 1 | 1976-11-30 |
Digital time-division multiplexing system
Grant 3,995,120 - Pachynski, Jr. November 30, 1 | 1976-11-30 |
Apparatus and method for digitally generating a modified duobinary signal
Grant 3,993,953 - Lender , et al. November 23, 1 | 1976-11-23 |
Programmable frequency detector
Grant 3,990,007 - Hohhof November 2, 1 | 1976-11-02 |
Modular control system design with microprocessors
Grant 3,986,170 - Valassis , et al. October 12, 1 | 1976-10-12 |
Cord adapter
Grant 3,982,809 - Ward , et al. September 28, 1 | 1976-09-28 |
I/O structure for microprocessor implemented systems
Grant 3,978,455 - Valassis , et al. August 31, 1 | 1976-08-31 |
Method and apparatus for incoherent adaptive mean-square equalization of differentially phase-modulated data signals
Grant 3,969,674 - Tracey July 13, 1 | 1976-07-13 |
Memory operation for 3-way communications
Grant 3,967,070 - Srivastava , et al. June 29, 1 | 1976-06-29 |
Intercept arrangement for key telephone systems
Grant 3,965,304 - Marheine June 22, 1 | 1976-06-22 |
Synthetic reactor circuit
Grant 3,965,447 - Thomas June 22, 1 | 1976-06-22 |
PCM tone receiver using optimum statistical technique
Grant 3,961,167 - Mills June 1, 1 | 1976-06-01 |
Digital line synchronizer
Grant 3,959,588 - Kelly , et al. May 25, 1 | 1976-05-25 |
Arrangement and method for the localized self-control of randomly allotted time slots to audio ports
Grant 3,959,594 - Srivastava May 25, 1 | 1976-05-25 |
Multiprocessing system implemented with microprocessors
Grant 3,959,775 - Valassis , et al. May 25, 1 | 1976-05-25 |
Digital phase detector
Grant 3,956,623 - Clark , et al. May 11, 1 | 1976-05-11 |
Case for electrical components
Grant 3,952,906 - Georgopulos April 27, 1 | 1976-04-27 |
Remote control transcribing device
Grant 3,953,680 - Zimmermann April 27, 1 | 1976-04-27 |
Adapter bracket for connecting blocks
Grant 3,950,054 - Ward , et al. April 13, 1 | 1976-04-13 |
Discrete ringing detector for use in key telephone systems
Grant 3,946,146 - Brown , et al. March 23, 1 | 1976-03-23 |
Digital logic circuits for producing digital sum and difference frequencies
Grant 3,943,454 - Getgen March 9, 1 | 1976-03-09 |
Addressable ticketing scanner
Grant 3,937,894 - Grzybowski , et al. February 10, 1 | 1976-02-10 |
Voltage monitor and control circuit
Grant 3,938,023 - Hutchinson February 10, 1 | 1976-02-10 |
Submultiplex transmission of alarm status signals for a time division multiplex system
Grant 3,936,609 - Waldeck February 3, 1 | 1976-02-03 |
Automatic disconnect circuit for subscriber carrier telephone system
Grant 3,934,089 - Stewart January 20, 1 | 1976-01-20 |
Component terminal system
Grant 3,932,012 - Reimer , et al. January 13, 1 | 1976-01-13 |
Tone injection circuit
Grant 3,931,474 - McLaughlin , et al. January 6, 1 | 1976-01-06 |
Input/output controller maintenance arrangement for a communication switching system
Grant 3,930,146 - Bogacz December 30, 1 | 1975-12-30 |
Ringer power generator circuit for subscriber carrier station terminal
Grant 3,927,266 - Stewart , et al. December 16, 1 | 1975-12-16 |
Communication switching system network control arrangement
Grant 3,922,499 - Athas , et al. November 25, 1 | 1975-11-25 |
Malfunction monitor control circuitry for central data processor of digital communication system
Grant 3,921,141 - Wilber , et al. November 18, 1 | 1975-11-18 |
Multi-phase clock distribution system
Grant 3,921,079 - Heffner , et al. November 18, 1 | 1975-11-18 |
Arrangement and method for switching the electronic subsystems of a common control communication switching system without interference to call processing
Grant 3,920,977 - Karsas November 18, 1 | 1975-11-18 |
Method and apparatus on in-circuit testing of a group of sequentially-operated system output bistable devices
Grant 3,919,504 - Crosley , et al. November 11, 1 | 1975-11-11 |
Video telephone subscriber interface circuit
Grant 3,917,904 - Macrander , et al. November 4, 1 | 1975-11-04 |
Method of assembly of crystal filters
Grant 3,916,490 - Sheahan , et al. November 4, 1 | 1975-11-04 |
Communication switching system computer memory control arrangement
Grant 3,916,384 - Fleming , et al. October 28, 1 | 1975-10-28 |
Stored program control with memory work area assignment in a communication switching system
Grant 3,916,112 - Kalat , et al. October 28, 1 | 1975-10-28 |
Method and apparatus for on line expansion of communication switching system call processing capabilities
Grant 3,916,113 - Heck , et al. October 28, 1 | 1975-10-28 |
Line circuit employing constant current devices for battery feed
Grant 3,916,110 - Lee , et al. October 28, 1 | 1975-10-28 |
Communication switching system data reformatting arrangement
Grant 3,916,389 - Winandy , et al. October 28, 1 | 1975-10-28 |
Method Of Static Trimming Of Film Deposited Resistors
Grant 3,916,142 - Ennis October 28, 1 | 1975-10-28 |
Emergency transfer circuit for use in a communication switching system
Grant 3,909,545 - Fuchs September 30, 1 | 1975-09-30 |
Trunk circuit control arrangement for a communication switching system
Grant 3,909,542 - Wunluck , et al. September 30, 1 | 1975-09-30 |
Program timing circuitry for central data processor of digital communications system
Grant 3,909,795 - Chang , et al. September 30, 1 | 1975-09-30 |
Arrangement for controlling a plurality of lamps
Grant 3,909,822 - Lee , et al. September 30, 1 | 1975-09-30 |
Line card for key telephone systems adapted to provide music during hold condition
Grant 3,909,553 - Marshall September 30, 1 | 1975-09-30 |
Peripheral control unit for a communication switching system
Grant 3,906,163 - Brenski , et al. September 16, 1 | 1975-09-16 |
Programmable proportional clock edge delay circuit
Grant 3,906,247 - Heffner September 16, 1 | 1975-09-16 |
Cable pair testing arrangement
Grant 3,906,174 - Dotter, Jr. September 16, 1 | 1975-09-16 |
Control of devices used as computer memory and also accessed by peripheral apparatus
Grant 3,905,024 - Boucek , et al. September 9, 1 | 1975-09-09 |
Arrangement for controlling the gain of two-way amplifiers in accordance with loop lengths
Grant 3,903,378 - Lee , et al. September 2, 1 | 1975-09-02 |
Timing error detection circuit
Grant 3,899,665 - Gaon August 12, 1 | 1975-08-12 |
Method and apparatus for testing communication switching system junctors
Grant 3,898,395 - Crosley , et al. August 5, 1 | 1975-08-05 |
Arrangement and method for using a magnetic tape to control hardware to load, check and routine a core memory
Grant 3,898,449 - Sanabria August 5, 1 | 1975-08-05 |
Wall telephone adapter assembly
Grant 3,898,394 - Ward , et al. August 5, 1 | 1975-08-05 |
Data processor system diagnostic arrangement
Grant 3,898,621 - Zelinski , et al. August 5, 1 | 1975-08-05 |
Automatic master clock track writer
Grant 3,893,172 - Celek July 1, 1 | 1975-07-01 |
Digital automatic frequency control system
Grant 3,893,040 - Harp July 1, 1 | 1975-07-01 |
Edge-lighted panel arrangement
Grant 3,892,959 - Pulles July 1, 1 | 1975-07-01 |
System of testing lines of a communication switching system
Grant 3,891,838 - Herr , et al. June 24, 1 | 1975-06-24 |
Circuit arrangement for ground start coin operated telephones
Grant 3,890,468 - Burns , et al. June 17, 1 | 1975-06-17 |
Time division switching system
Grant 3,890,469 - Kelly , et al. June 17, 1 | 1975-06-17 |
Electric resonant transfer filter
Grant 3,886,316 - Getgen May 27, 1 | 1975-05-27 |
Loop Shaped Circuit Test Point
Grant 3,885,854 - Reimer May 27, 1 | 1975-05-27 |
Spring clip wire terminating arrangement
Grant 3,885,853 - Reimer May 27, 1 | 1975-05-27 |
Configuration control circuit for control and maintenance complex of digital communications system
Grant 3,882,455 - Heck , et al. May 6, 1 | 1975-05-06 |
Duo-baffle air separator apparatus
Grant 3,874,444 - Perce , et al. April 1, 1 | 1975-04-01 |
Electronic tone ringer
Grant 3,867,585 - Morstadt February 18, 1 | 1975-02-18 |
Latching spring clip device for securing electrical cable connectors to printed wiring cards
Grant 3,867,000 - Michalak , et al. February 18, 1 | 1975-02-18 |
Pulse width shortening circuit
Grant 3,867,648 - Christenson February 18, 1 | 1975-02-18 |
Adapter for automatic telephone answering devices permitting remote monitoring of recorded messages
Grant 3,867,578 - Uechi February 18, 1 | 1975-02-18 |
Timing Monitor Circuit For Central Data Processor Of Digital Communication System
Grant 3,866,184 - Buhrke , et al. February 11, 1 | 1975-02-11 |
Pulse Train Wave Shaping Means And Method
Grant 3,865,988 - Getgen February 11, 1 | 1975-02-11 |
Tape Position Indicator Means For Telephone Answering Apparatus
Grant 3,863,029 - Zimmermann January 28, 1 | 1975-01-28 |
Plastic Pawl With Integral Pawl Spring
Grant 3,862,580 - Pulles January 28, 1 | 1975-01-28 |
Uniform Plating Current Apparatus And Method
Grant 3,862,891 - Smith January 28, 1 | 1975-01-28 |
Data Transmission Method
Grant 3,863,025 - Gonsewski , et al. January 28, 1 | 1975-01-28 |
Pcm Tone Receiver Using Digital Spectrum Analysis
Grant 3,863,030 - Mills January 28, 1 | 1975-01-28 |
Electrical Protective Device Using A Reed Relay
Grant 3,858,089 - Poindexter December 31, 1 | 1974-12-31 |
Sliding Three Dimensional Packaging Technique
Grant 3,858,154 - William December 31, 1 | 1974-12-31 |
Combined Timing-outpulsing-scanning Circuit
Grant 3,851,120 - Crosley November 26, 1 | 1974-11-26 |
Digital Dial Pulse Receiver
Grant 3,851,110 - Kelly , et al. November 26, 1 | 1974-11-26 |
Printed Wiring Card Stiffener Bracket
Grant 3,851,222 - Michalak , et al. November 26, 1 | 1974-11-26 |
Data Detector With Voice Signal Discrimination
Grant 3,851,112 - Kusan November 26, 1 | 1974-11-26 |
Crosspoint Matrix Arrangement For Space-division Communication Switching Network
Grant 3,851,124 - Garavalia November 26, 1 | 1974-11-26 |
Path Verification Arrangement For Automatically Testing Conditions
Grant 3,851,122 - Gibson November 26, 1 | 1974-11-26 |
Tsps-headphone Plug Messages
Grant 3,851,111 - Young November 26, 1 | 1974-11-26 |
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