Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869835 | Ion source | Soichi Ogawa, Shigeo Fukui, Tsutomu Ueno | 1989-09-26 |
| 4817707 | Heating soft floor mat | Kazuo Aoyama, Yukitaka Murata, Kiyoshi Hattori, Kiyoshi Takahashi, Takashi Sasaki +1 more | 1989-04-04 |