Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4429032 | Surface-treated vinyl chloride polymer material including an adhering hydrophilic layer | Herman L. Matthe, Lucien J. Van Gossum | 1984-01-31 |
| 4425421 | Process for the production of a laminar article and such article containing information in a hydrophilic colloid stratum | Antonius A. Rutges, Maurits W. Van Grasdorff | 1984-01-10 |
| 4242436 | Photographic material for continuous tone reproduction | Leon L. Vermeulen | 1980-12-30 |
| 4224402 | Photographic material for use in the silver complex diffusion transfer process | Leon L. Vermeulen | 1980-09-23 |