Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5460781 | Hemoglobin sampler | Hironobu Hori, Mitsushi Gotanda, Takayuki Yanagiya, Atsushi Umetani | 1995-10-24 |
| 4761089 | Synthetic resin pen nib | Ryutaro Sakuda | 1988-08-02 |
| 4597932 | Method of manufacturing synthetic resin pen nibs | Ryutaro Sakuda | 1986-07-01 |