Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800744 | Production of a taper rod | Heijiro Kawakami, Yasunobu Kawaguchi, Kozo Katsube, Susumu Takada | 1989-01-31 |
| 4801106 | Coil of tapered wire | Heijiro Kawakami, Yasunobu Kawaguchi, Kozo Katsube, Susumu Takada | 1989-01-31 |