Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869925 | Method for preparing aluminum nitride and its sinter | Atsuhiko Hiai, Kazuo Wakimura, Masao Tanaka | 1989-09-26 |
| 4823689 | Elastic roller with internal openings for use with image forming apparatus | Kazuo Kishino, Michio Shigenobu, Hiromitsu Hirabayashi, Takashi Hibi, Kensaku Kusaka | 1989-04-25 |