Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889774 | Carbon-fiber-reinforced metallic material and method of producing the same | Toyoko Ohshima, Toshinobu Hata | 1989-12-26 |
| 4838961 | Method of manufacturing high strength blank a bolt | Mitsushi Higuchi, Kunio Namiki | 1989-06-13 |