Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D322669 | Electric fan | Takashi Yamamoto, Hirofumi Tanaka, Yasuo Tsumurai | 1991-12-24 |
| D315598 | Electric fan | Takashi Yamamoto, Koichi Hasegawa, Yasuo Tsumurai | 1991-03-19 |
| D315624 | Electric vacuum cleaner | Shigetaka Kimura, Kouichi Hasegawa, Kouichi Sagawa, Syuji Watanabe | 1991-03-19 |
| D313919 | Microwave oven | Masahito Naito, Toshiro Higa, Eiichi Kubota, Takeichi Obata | 1991-01-22 |
| D304281 | Microwave oven | Masahito Naito, Toshiro Higa, Eiichi Kubota, Takeichi Obata | 1989-10-31 |