Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814829 | Projection exposure apparatus | Masao Kosugi, Akiyoshi Suzuki, Hideki Ina, Kazuhito Outsuka, Masao Totsuka +1 more | 1989-03-21 |
| 4803389 | Stepping motor, method of driving the same and drive circuit therefor | Eiichi Tsukada | 1989-02-07 |