Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5305233 | Spectrophotometer for accurately measuring light intensity in a specific wavelength region | Nobukazu Kawagoe, Masami Sugiyama | 1994-04-19 |
| 5214494 | Light sensor with an adjustable spectral characteristic | Masami Sugiyama | 1993-05-25 |
| 5175697 | Spectrophotometer for accurately measuring light intensity in a specific wavelength region | Nobukazu Kawagoe, Masami Sugiyama | 1992-12-29 |
| 5004349 | Lighting apparatus and color measuring apparatus using the same | Tsuyoshi Sato, Naoya Takata | 1991-04-02 |
| 4995727 | Compact diffusion light mixing box and colorimeter | Nobukazu Kawagoe, Masami Sugiyama | 1991-02-26 |
| 4717861 | Electronic flash device | Yoshio Yuasa, Kazuhiko Naruse | 1988-01-05 |
| 4704025 | Enlarger for use in photography | Yoshio Yuasa, Hidetoshi Yasumoto, Kazuhiko Naruse, Nobukazu Kawagoe | 1987-11-03 |
| 4655576 | Light measuring device | Yoshio Yuasa, Kazuhiko Naruse | 1987-04-07 |
| 4608522 | Electronic flash device | Yoshio Yuasa, Kazuhiko Naruse | 1986-08-26 |
| 4576470 | Enlarger for use in photography | Yoshio Yuasa, Hidetoshi Yasumoto, Kazuhiko Naruse, Nobukazu Kawagoe | 1986-03-18 |
| 4575225 | Color enlarger | Yoshio Yuasa, Hidetoshi Yasumoto, Kazuhiko Naruse, Nobukazu Kawagoe | 1986-03-11 |
| 4551011 | Light source for exposure | Yoshio Yuasa, Hidetoshi Yasumoto, Nobukazu Kawagoe, Kazuhiko Naruse | 1985-11-05 |
| 4469437 | Light measurement and light control data calculation device for a photographic enlarger | Yoshio Yuasa, Hidetoshi Yasumoto, Kazuhiko Naruse, Nobukazu Kawagoe | 1984-09-04 |