Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5118349 | Security markings, material provided with security marks, and apparatus to detect the security mark | — | 1992-06-02 |
| 4921280 | Security fibers and other materials made luminescent by a dyeing process, processes for their manufacture and their applications | — | 1990-05-01 |
| 4921534 | Security markings, material provided with security marks, and apparatus to detect the security mark | — | 1990-05-01 |
| 4891505 | Security markings, material provided with security marks, and apparatus to detect the security mark | — | 1990-01-02 |
| 4833311 | Security markings, material provided with security marks, and apparatus to detect the security mark | — | 1989-05-23 |
| 4736425 | Security marking method, materials provided with security marks | — | 1988-04-05 |
| 4655788 | Security fibers and other materials made luminescent by a dyeing process, processes for their manufacture and their applications | — | 1987-04-07 |