Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6175625 | Control circuits for electric coding machines | Donald W. Seiler | 2001-01-16 |
| 4404426 | Cryptographic telegraphy programming system | — | 1983-09-13 |
| 4332977 | Teletypewriter privacy system | — | 1982-06-01 |
| 4187392 | Synchronous universal binary scrambler | — | 1980-02-05 |