Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4443537 | Hydroquinone derivatives and their use in photographic materials | Stephen Postle, Patrick D. P. Thomas | 1984-04-17 |
| 4417072 | Hydroquinone derivatives and their use in photographic materials | Stephen Postle, Patrick D. P. Thomas | 1983-11-22 |
| 4386149 | Process for the production of photographic images by dye diffusion transfer and photographic material suitable in this process | Leslie F. A. Mason, Rainer Kitzing, William E. Long, Glenn Wood, David L. R. Reeves | 1983-05-31 |
| 4285859 | Azo compounds useful in a photographic dye diffusion transfer process | Rainer Kitzing, William E. Long, David L. R. Reeves, Glenn Wood | 1981-08-25 |
| 4277398 | Magenta-masked color azopyrazolinone couplers | — | 1981-07-07 |
| 4269928 | Process for the production of photographic images by dye diffusion transfer and photographic material suitable in this process | Leslie F. A. Mason, Rainer Kitzing, William E. Long, Glenn Wood, David L. R. Reeves | 1981-05-26 |
| 4216146 | Azo(hydrazo)-anthraquinone compounds | Rainer Kitzing, William E. Long, David L. R. Reeves, Glenn Wood | 1980-08-05 |