Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857967 | Light source device | Kazuhiko Naruse | 1989-08-15 |
| 4704025 | Enlarger for use in photography | Yoshio Yuasa, Kazuhiko Naruse, Nobukazu Kawagoe, Masahito Inaba | 1987-11-03 |
| 4576470 | Enlarger for use in photography | Yoshio Yuasa, Kazuhiko Naruse, Nobukazu Kawagoe, Masahito Inaba | 1986-03-18 |
| 4575225 | Color enlarger | Yoshio Yuasa, Kazuhiko Naruse, Nobukazu Kawagoe, Masahito Inaba | 1986-03-11 |
| 4551011 | Light source for exposure | Yoshio Yuasa, Nobukazu Kawagoe, Kazuhiko Naruse, Masahito Inaba | 1985-11-05 |
| 4531830 | Automatic focusing device for an enlarger | Yoshio Yuasa, Nobukazu Kawagoe | 1985-07-30 |
| 4469437 | Light measurement and light control data calculation device for a photographic enlarger | Yoshio Yuasa, Kazuhiko Naruse, Nobukazu Kawagoe, Masahito Inaba | 1984-09-04 |