Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5327490 | System and method for controlling call placement rate for telephone communication systems | — | 1994-07-05 |
| 5311588 | Call progress detection circuitry and method | Michael J. Polcyn, Howard S. Barnett | 1994-05-10 |
| 5247569 | System and method for controlling outbound and inbound calls in a telephone communication system | — | 1993-09-21 |
| 4959854 | Apparatus and method for automatically reconfiguring telephone network resources | Dwain H. Hammond, Michael J. Polcyn | 1990-09-25 |
| 4599493 | Multi-line telephone control system | — | 1986-07-08 |
| 4405833 | Telephone call progress tone and answer identification circuit | Neil Hazelwood | 1983-09-20 |
| 4340913 | Tri-level digital recording | — | 1982-07-20 |
| 4333056 | Automatic gain control circuit with non-negative exponential release | — | 1982-06-01 |
| 4251800 | Tilt compensating AGC | Medford D. Sanner | 1981-02-17 |