Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6377576 | Telephone call setup procedure | Howard Bubb | 2002-04-23 |
| 5701340 | AD-HOC conferencing method | — | 1997-12-23 |
| 5638436 | Voice detection | Chris Hamilton | 1997-06-10 |
| 5459781 | Selectively activated dual tone multi-frequency detector | Jeffrey Kaplan | 1995-10-17 |
| 5185786 | Automatic call center overflow retrieval system | — | 1993-02-09 |
| 5161181 | Automatic number identification blocking system | — | 1992-11-03 |
| 4862492 | Measurement of transmission quality of a telephone channel | — | 1989-08-29 |
| 4852149 | Automated call filter | Charles R. Walden Jr., Louis Francz, Jay L. Gerbehy | 1989-07-25 |
| 4760516 | Peripheral interrupt interface for multiple access to an interrupt level | — | 1988-07-26 |