Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D268931 | Keyloader module for encryption systems or similar article | Robert W. Ellis | 1983-05-10 |
| D264843 | Multiple module serial link encryption unit or similar article | Robert F. Pfeifer, Robert Samson | 1982-06-08 |
| D263395 | Multiple module serial link encryption unit or similar article | Robert F. Pfeifer, Robert Samson | 1982-03-16 |
| D255899 | Code entry terminal for security access system | Robert F. Pfeifer, Robert Samson | 1980-07-15 |