Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5005200 | Public key/signature cryptosystem with enhanced digital signature certification | — | 1991-04-02 |
| 5001752 | Public/key date-time notary facility | — | 1991-03-19 |
| 4881197 | Document composition system using named formats and named fonts | — | 1989-11-14 |
| 4868877 | Public key/signature cryptosystem with enhanced digital signature certification | — | 1989-09-19 |