Issued Patents All Time
Showing 51–66 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5460919 | Process of forming super high-contrast negative images and silver halide photographic material and developer being used therefor | Naoki Obi, Yasuo Shigemitsu, Jun Takeuchi, Kiyoshi Suematsu | 1995-10-24 |
| 5372911 | Process of forming super high-contrast negative images and silver halide photographic material and developer being used therefor | Naoki Obi, Yasuo Shigemitsu, Jun Takeuchi, Kiyoshi Suematsu | 1994-12-13 |
| 5362621 | Direct positive silver halide photographic material and method for forming high contrast positive image using the same | Naoki Obi, Kiyoshi Suematsu, Masatoshi Katayama, Yasuo Shigemitsu | 1994-11-08 |
| 5284733 | High-contrast image forming process | Naoki Obi, Yasuo Shigemitsu, Kiyoshi Suematsu | 1994-02-08 |
| 5275915 | Developer for light-sensitive material | Yasuo Shigemitsu | 1994-01-04 |
| 5217842 | Superhigh contrast negative image forming process | Naoki Obi, Yasuo Shigemitsu | 1993-06-08 |
| 4882261 | High contrast dot enhancing compositions and photographic products and methods for their use | John F. Pilot, Burton H. Waxman | 1989-11-21 |
| 4871540 | Process for producing a biologically active substance and compositions containing the same | Sadao Tamamura | 1989-10-03 |
| 4724196 | Silver halide photographic lith material | Tadao Shoji, Yonosuke Tsuka, Naoki Obi, Yasuo Shigemitsu | 1988-02-09 |
| 4533547 | Antiviral antibiotic substance AM-2722 and process for production thereof | Satoshi Omura, Akira Nakagawa, Hiroshi Hashimoto, Yuzuru Iwai, Ruiko Oiwa +1 more | 1985-08-06 |
| 4469685 | Process for producing interferon inducers | Seishi Konno, Sadao Tamamura, Takashi Hashimoto | 1984-09-04 |
| 4456597 | Interferon inducer, a process for producing the same and pharmaceutical composition containing the same | Seishi Konno, Takashi Hashimoto | 1984-06-26 |
| 4442087 | Interferon inducer, a process for producing the same and pharmaceutical composition containing the same | Seishi Konno, Sadao Tamamura, Takashi Hashimoto, Nobuyuki Shibukawa | 1984-04-10 |
| 4440761 | Interferon inducer, a process for producing the same and pharmaceutical composition containing the same | Seishi Konno, Takashi Hashimoto | 1984-04-03 |
| 4421746 | Process for producing interferon inducers | Sadao Tamamura, Seishi Konno, Takashi Hashimoto | 1983-12-20 |
| 4419349 | Interferon inducer, a process for producing the same and pharmaceutical composition containing the same | Seishi Konno, Sadao Tamamura, Yoshimoto Sano, Nobuyuki Shibukawa, Takashi Hashimoto | 1983-12-06 |