Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5143823 | Color photographic recording material containing color couplers | — | 1992-09-01 |
| 5134059 | Color photographic recording material containing color couplers | Werner Liebe | 1992-07-28 |
| 5009985 | Iron complexes and bleaching baths containing same | Ralf Wichmann | 1991-04-23 |
| 4897341 | Color photographic recording material containing a dir-coupler | Heinrich Odenwalder, Hans Ohlschlager, Dirk Hubner | 1990-01-30 |
| 4840880 | Color photographic recording material containing a yellow DIR coupler | Hans Ohlschlager, Gunter Renner, Heinrich Odenwalder, Dirk Hubner | 1989-06-20 |
| 4833070 | Color photographic recording material containing a yellow DIR coupler | Hans hlschlager, Heinrich Odenwalder, Dirk Hubner | 1989-05-23 |
| 4762777 | Polyurea and polyurethane compounds containing a photographically useful group, and a photographic recording material containing such compounds | Guter Helling, Helmut Reiff | 1988-08-09 |
| 4756998 | Polymeric couplers and light-sensitive photographic silver halide recording material containing such couplers | Gunter Helling, Hans Langen | 1988-07-12 |
| 4617256 | Color photographic color coupler-containing recording material | Karl-Wilhelm Schranz | 1986-10-14 |
| 4581324 | Color photographic recording material for the production of color images viewed by reflected light | Erich Wolff, Gunter Renner | 1986-04-08 |
| 4438195 | Photographic recording material containing a developer compound | Karl-Wilhelm Schranz | 1984-03-20 |
| 4386155 | Process for the production of photographic images | Peter Bergthaller, Karl-Wilhelm Schranz, Erich Wolff | 1983-05-31 |
| 4322492 | Process for the development of color photographic images with p-dialkylaminoaniline color developers | Walter Puschel, Karl-Wilhelm Schranz | 1982-03-30 |
| 4267263 | Use of .beta.-aminoethyl carbamic acid for producing photographic baths and developer compositions | Erich Wolff, Karl Frank | 1981-05-12 |
| 4186019 | Color photographic material containing novel 2-equivalent yellow couplers | Heinz Salzmann | 1980-01-29 |