Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4352561 | Calibrating apparatus in a monochromator | Shigeo Tohyama, Isao Nemoto | 1982-10-05 |
| 4323309 | Spectro-photometer with arithmetic and control unit | Shigeo Tohyama | 1982-04-06 |
| 4304490 | Spectrophotometer | Takeo Murakoshi, Isao Nemoto, Shigeo Tohyama | 1981-12-08 |
| 4283732 | Recording system with inter-line space positioning means | Shigeo Tohyama | 1981-08-11 |
| 4227811 | Spectrophotometer | Shigeo Tohyama | 1980-10-14 |