Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869659 | Toggle-type die-fastening apparatus | Seiya Sakai, Toshiro Saito | 1989-09-26 |
| 4861659 | High tenacity acrylonitrile fibers and a process for production thereof | Takashi Takada, Kenichi Hirao, Hiroyoshi Tanaka | 1989-08-29 |
| 4799180 | Adaptive automatic equalizer | — | 1989-01-17 |