Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867562 | Atomic absorption spectrophotometer | Masamichi Tsukada, Masatoshi Kitagawa, Toyoharu Okumoto, Hayato Tobe | 1989-09-19 |
| 4840484 | Atomic absorption spectrophotometer with furnace at pressure equal or near light source pressure | Toyoharu Okumoto, Hayato Tobe, Masamichi Tsukada | 1989-06-20 |