Grell; Axel
Patent Applications and Registrations
Patent applications and USPTO patent grants for Grell; Axel.The latest application filed is for "headphone".
- Grell; Axel - Burgdorf DE
- Grell; Axel - Wedemark DE
| Patent | Date |
|---|---|
| Headphone Grant 10,477,293 - Grell , et al. Nov | 2019-11-12 |
| Headphone unit Grant 10,178,465 - Grell , et al. J | 2019-01-08 |
| Method of controlling an audio amplifier unit and audio amplifier unit Grant 10,128,806 - Grimm , et al. November 13, 2 | 2018-11-13 |
| Headphone App 20180249237 - Grell; Axel ; et al. | 2018-08-30 |
| Methods and devices for reproducing surround audio signals Grant 9,918,179 - Kuhr , et al. March 13, 2 | 2018-03-13 |
| Method of Controlling an Audio Amplifier Unit and Audio amplifier Unit App 20180013394 - Grimm; Alexander ; et al. | 2018-01-11 |
| Methods And Devices For Repoducing Surround Audio Signals App 20170180907 - Kuhr; Markus ; et al. | 2017-06-22 |
| Headphone Unit App 20170180845 - Grell; Axel ; et al. | 2017-06-22 |
| Methods and devices for reproducing surround audio signals Grant 9,635,484 - Kuhr , et al. April 25, 2 | 2017-04-25 |
| Hifi Audio Tube Amplifier App 20170085227 - Kratzer; Dirk ; et al. | 2017-03-23 |
| Headphone and headset Grant 9,247,337 - Foudhaili , et al. January 26, 2 | 2016-01-26 |
| Headphone and Headset App 20150030173 - Foudhaili; Hatem ; et al. | 2015-01-29 |
| Methods And Devices For Reproducing Surround Audio Signals App 20140334650 - Kuhr; Markus ; et al. | 2014-11-13 |
| Methods and devices for reproducing surround audio signals Grant 8,885,834 - Kuhr , et al. November 11, 2 | 2014-11-11 |
| Dynamic sound transducer and receiver Grant 8,731,231 - Teske-Fischer , et al. May 20, 2 | 2014-05-20 |
| Receiver Grant 8,363,874 - Grell , et al. January 29, 2 | 2013-01-29 |
| Headphones and headset Grant 8,295,530 - Grell October 23, 2 | 2012-10-23 |
| Electroacoustic transducer Grant 8,215,445 - Wildhagen , et al. July 10, 2 | 2012-07-10 |
| Converter system for an active noise compensation apparatus Grant 8,180,092 - Grell , et al. May 15, 2 | 2012-05-15 |
| Wire-free headset, portable media player Grant 8,103,015 - Meyer , et al. January 24, 2 | 2012-01-24 |
| Headphones And Headset App 20110164775 - GRELL; AXEL | 2011-07-07 |
| Methods And Devices For Reproducing Surround Audio Signals App 20110135098 - Kuhr; Markus ; et al. | 2011-06-09 |
| Headphone set Grant 7,940,947 - Kaulfuss , et al. May 10, 2 | 2011-05-10 |
| Electroacoustic Transducer App 20110031061 - Wildhagen; Jens ; et al. | 2011-02-10 |
| Receiver App 20110007930 - Grell; Axel ; et al. | 2011-01-13 |
| Dynamic Sound Transducer And Receiver App 20100183173 - Teske-Fischer; Till ; et al. | 2010-07-22 |
| Headphones Grant 7,639,832 - Mann , et al. December 29, 2 | 2009-12-29 |
| Converter System for an Active Noise Compensation Apparatus App 20090136055 - Grell; Axel ; et al. | 2009-05-28 |
| Headset with Active Noise Compensation App 20090103745 - Grell; Axel ; et al. | 2009-04-23 |
| Wire-Free Headset, Portable Media Player App 20090022334 - Meyer; Rolf ; et al. | 2009-01-22 |
| Headphones App 20080049963 - Mann; Wolfgang ; et al. | 2008-02-28 |
| Acoustic Transducer App 20080008347 - Hinke; Claus-Peter ; et al. | 2008-01-10 |
| Headphone set App 20070297633 - Kaulfuss; Johannes ; et al. | 2007-12-27 |
| Headphone App 20070258608 - Neihoff; Wolfgang ; et al. | 2007-11-08 |
| Headphones Grant 7,292,703 - Kaulfuss , et al. November 6, 2 | 2007-11-06 |
| Headphone Grant 7,162,051 - Grell , et al. January 9, 2 | 2007-01-09 |
| Headphones App 20050244027 - Kaulfuss, Johannes ; et al. | 2005-11-03 |
| Closed headphones with transducer system Grant 6,934,401 - Grell , et al. August 23, 2 | 2005-08-23 |
| Headphone App 20040156521 - Grell, Axel ; et al. | 2004-08-12 |
| Closed headphones with transducer system App 20030039375 - Grell, Axel ; et al. | 2003-02-27 |
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