Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808223 | Silver/metal oxide material for electrical contacts and method of producing the same | Ryoji Ozaki, Hisaji Shinohara, Hironobu Yamamoto, Takashi Nara | 1989-02-28 |
| 4801372 | Optically anisotropic pitch | Kazuhito Tate, Teruhiko Sasaki | 1989-01-31 |