Langen, Hans
Patent Applications and Registrations
Patent applications and USPTO patent grants for Langen, Hans.The latest application filed is for "colour photographic silver halide material".
- Langen, Hans - Bonn DE
- Langen; Hans - Frechen DE
- Langen; Hans - Dusseldorf DE
| Patent | Date |
|---|---|
| Colour photographic silver halide material App 20020045138 - Odenwalder, Heinrich ; et al. | 2002-04-18 |
| Color photographic recording material having a yellow filter layer which contains an arylidene dye of isoxazolone as the yellow filter dye Grant 5,776,667 - Ohlschlager , et al. July 7, 1 | 1998-07-07 |
| Three-point coupling device Grant 4,944,354 - Langen , et al. July 31, 1 | 1990-07-31 |
| Light sensitive, stabilized photographic recording material Grant 4,943,519 - Helling , et al. July 24, 1 | 1990-07-24 |
| Solid preparation of water-soluble acid dye and polymer particles with quaternary ammonium or phosphonium groups Grant 4,459,130 - Helling , et al. July 10, 1 | 1984-07-10 |
| Multiple-part hobbing cutter Grant 4,218,159 - Langen August 19, 1 | 1980-08-19 |
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