Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5946380 | Communications system and method with call expenditure control | Steve L. Cohen, Michael Davitt, Leonard Matulewski, Alan B. Moshinsky, Usha Rao | 1999-08-31 |
| 4891835 | Method and device for recording and replaying audio communications | Keith Leung, John D. Goldson, Wayne C. Hoffman | 1990-01-02 |