Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5668506 | Temperature compensated crystal oscillator | Takao Watanabe, Mutsuo Hayashi, Kazunari Matsumoto, Chikara Tsuchiya, Eiji Nishimori | 1997-09-16 |
| 5609458 | Method of charging coal into chamber furnace-type coke oven and apparatus therefor | Kouji Hanaoka, Katsutoshi Igawa, Seiji Taguchi, Kenichi Sorimachi | 1997-03-11 |