Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4686170 | Photographic silver complex diffusion transfer reversal process under yellow safelight | Leon L. Vermeulen, Willy P. De Smedt, Ludovicus H. Vervloet, Paul Callant | 1987-08-11 |
| 4202695 | Photographic Lippmann emulsions | Herman A. Philippaerts, Robert J. Pollet, Wolfgang Muller-Bardorff, Wilhelm Saleck, Anita von Konig +2 more | 1980-05-13 |