Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829514 | Digital voice recording and reproduction and telephone network signalling using direct storage in RAM of PCM encoded data | James J. Frimmel, Jr., Thomas Ouellette, Richard N. Deglin | 1989-05-09 |