| 10771875 |
Gradient micro-electro-mechanical systems (MEMS) microphone |
John Charles Baumhauer, Jr., Fengyuan Li, Alan Dean Michel, Marc Reese |
2020-09-08 |
| 10154330 |
Gradient micro-electro-mechanical systems (MEMS) microphone |
John Charles Baumhauer, Jr., Fengyuan Li, Alan Dean Michel, Marc Reese |
2018-12-11 |
| 8300871 |
Earphone for wideband communication |
Christopher Todd Welsh, John Charles Baumhauer, Jr. |
2012-10-30 |
| 7751575 |
Microphone system for communication devices |
John Charles Baumhauer, Jr., Christopher Todd Welsh, Alan Dean Michel, Jeffrey Phillip McAteer |
2010-07-06 |
| 7646865 |
Telephone handset coupling system |
Christopher Todd Welsh, Alan Dean Michel, Michael Thomas Frank, John Charles Baumhauer, Jr. |
2010-01-12 |
| 7182324 |
Microphone isolation system |
John Charles Baumhauer, Jr., Robert Spaller, Thao D. Hovanky, Peter L. Chu, Denton L. Simpson |
2007-02-27 |
| 6389145 |
Methods and apparatus for controlling the output of moving armature transducers |
John Charles Baumhauer, Jr. |
2002-05-14 |
| 5740257 |
Active noise control earpiece being compatible with magnetic coupled hearing aids |
— |
1998-04-14 |
| 5696359 |
Portable loudspeaker/directional microphone peripheral |
Christopher Todd Welsh |
1997-12-09 |
| 5651074 |
Noise canceling gradient microphone assembly |
John Charles Baumhauer, Jr. |
1997-07-22 |
| 5586183 |
Extendable telephone handset with flexible electrical interconnection and matched impedance acoustical interface |
William J. McLaughlin |
1996-12-17 |
| 5450372 |
Magnetoresistive microphone and acoustic sensing devices |
Sungho Jin, Mark Thomas McCormack |
1995-09-12 |
| D355917 |
Telephone handset |
Anthony J. Grewe, William J. McLaughlin, David Stowers, Michael P. Zambelli |
1995-02-28 |
| 5291541 |
Coupling apparatus for telephone handsets |
Clinton D. Gibler, Frederick A. Rosebrock, Perry K. White |
1994-03-01 |