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Patent applications and USPTO patent grants for Haefner; John A..The latest application filed is for "sensitized high aspect ratio silver halide emulsions and photographic elements".
Patent | Date |
---|---|
Sensitized high aspect ratio silver halide emulsions and photographic elements Grant 4,439,520 - Kofron , et al. March 27, 1 | 1984-03-27 |
High aspect ratio silver bromoiodide emulsions and processes for their preparation Grant 4,434,226 - Wilgus , et al. February 28, 1 | 1984-02-28 |
Photographic Diffusion Transfer Product And Process Grant 3,753,764 - Haefner August 21, 1 | 1973-08-21 |
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