Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6330235 | Method and apparatus providing data communication over an existing telephone network without interfering with normal telephony functions | Kevin P. Grundy, John K. Seamons | 2001-12-11 |
| 5483580 | Methods and apparatus for non-simultaneous transmittal and storage of voice message and digital text or image | Yigal Brandman, Charlotte Koerschen, Frank Lin, Shahryar Soroosh, Jason Subramaniam +1 more | 1996-01-09 |
| 5479498 | Digital line card having universal port for upgrading electronic messaging system | Yigal Brandman, Frank Lin, Manoj Puri, Jason Subramaniam | 1995-12-26 |
| 5394460 | Voice processing systems connected in a cluster | Burton N. Kendall | 1995-02-28 |
| 5301226 | Voice processing systems connected in a cluster | Burton N. Kendall | 1994-04-05 |
| 5136648 | Message storage security system | Holley Taylor, Thomas Mandey | 1992-08-04 |
| 4521647 | Tone detection system and method | Samuel R. Hawes | 1985-06-04 |