Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9057159 | Paper that cannot be forged using solvents | — | 2015-06-16 |
| 5330622 | Composition for rendering a paper or textile base resistant to water, oil and solvents, treated base and process for the production of the treated base | Claude R. Riou | 1994-07-19 |
| 5264081 | Forgery-proof safety paper | Claude R. Riou | 1993-11-23 |
| 5156717 | Non-fluorescent forgery-proof safety paper and document obtained | Claude R. Riou | 1992-10-20 |
| 5123999 | Forgery-proof security paper and aqueous or organic composition especially useful for rendering paper forgery-proof | Claude R. Riou | 1992-06-23 |
| 4725497 | Unfalsifiable safety paper | Claude R. Riou, Louis Raux | 1988-02-16 |