Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5024907 | Solid electrolyte tube for sodium sulfur cells and surface finishing process thereof | Masaaki Ohshima, Akira Kobayashi, Hiromi Shimada | 1991-06-18 |
| 4800320 | Discharge tube for a high pressure metal vapor discharge lamp and a method of manufacturing the same | Takehiro Kajihara, Hirotsugu Izumiya | 1989-01-24 |
| 4731561 | Ceramic envelope device for high-pressure discharge lamp | Hirotsugu Izumiya, Takehiro Kajihara | 1988-03-15 |
| 4687969 | Discharge tube for a high pressure metal vapor discharge lamp and a method of manufacturing the same | Takehiro Kajihara, Hirotsugu Izumiya | 1987-08-18 |
| 4665344 | Ceramic envelope device for high-pressure discharge lamp | Takehiro Kajihara, Hirotsugu Izumiya | 1987-05-12 |
| 4222783 | Barium titanate series ceramics having a positive temperature coefficient of electric resistance | Shigetaka Wada | 1980-09-16 |