Issued Patents 1994
Showing 1–2 of 2 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 |