Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |