Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883933 | Traveling wire electroerosion machine | Takeshi Yatomi | 1989-11-28 |
| 4869995 | Positive type photosensitive resinous composition | Masamitsu Shirai, Masahiro Tsunooka, Kanji Nishijima, Katsukiyo Ishikawa | 1989-09-26 |
| 4808786 | Wire electrode type electric discharge machining device with preventable application of external force to its lower arm | Masaru Shinkai, Jun Aramaki, Masaaki Onizuka | 1989-02-28 |