| 6330325 |
Automatic log-off signaling for telephone systems |
Kirk A. Reid |
2001-12-11 |
| 5991645 |
Wireless telephone headset system with automatic log on/log off detection |
Barry K. Yuen |
1999-11-23 |
| 5926543 |
Headset amplifier with automatic log on/log off detection |
Kirk A. Reid, Shu-Ren Chen |
1999-07-20 |
| RE35536 |
Telephone headset amplifier with battery saver, receive line noise reduction, and click-free mute switching |
Pierre Irissou, Shu-Ren Chen, Kirk A. Reid |
1997-06-17 |
| 5553312 |
Data transfer and communication network |
Phillip A. Gattey, Barry K. Yuen |
1996-09-03 |
| 5488657 |
Apparatus for and method of operating an automatic log on/log off circuit in a telephone system by disconnecting a headset |
Kirk A. Reid, Shu-Ren Chen |
1996-01-30 |
| 5353347 |
Telephone headset amplifier with battery saver, receive line noise reduction, and click-free mute switching |
Pierre Irissou, Shu-Ren Chen, Kirk A. Reid |
1994-10-04 |
| 5226077 |
Headset amplifier with automatic log on/log off detection |
Kirk A. Reid, Shu-Ren Chen |
1993-07-06 |
| 5070527 |
Time dependant, variable amplitude threshold output circuit for frequency variant and frequency invarient signal discrimination |
— |
1991-12-03 |
| 4928307 |
Time dependent, variable amplitude threshold output circuit for frequency variant and frequency invariant signal discrimination |
— |
1990-05-22 |