Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE31720 | Digital encoding circuitry | Richard E. DeFreitas | 1984-10-30 |
| 4462106 | Digital encoding circuitry | Richard E. De Freitas | 1984-07-24 |
| 4254502 | Digital encoding circuitry | Richard E. DeFreitas | 1981-03-03 |