Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6392390 | Synchronous switching apparatus for use with a multiple phase power system | Hiroki Ito, Haruhiko Kohyama | 2002-05-21 |
| 6172863 | Phase control switching system | Hiroki Ito, Haruhiko Kohyama | 2001-01-09 |
| 5885917 | Porous lithium aluminate carrier of spinel structure for catalyst | Kyoji Ohdan, Tokuo Matsuzaki | 1999-03-23 |
| 5688984 | Porous lithium aluminate carrier of spinel structure for catalyst | Kyoji Ohdan, Tokuo Matsuzaki | 1997-11-18 |
| 5514844 | Switch | Suenobu Hamano, Hiroyuki Sasao, Katsuhiko Horinouchi, Yoshiki Hirano, Haruhiko Kohyama | 1996-05-07 |
| 5451731 | Circuit breaker and driving mechanism thereof | Toshiaki Yoshizumi | 1995-09-19 |
| 5387773 | Gas circuit breaker | Nobuya Nakajima, Toshiaki Yoshizumi | 1995-02-07 |
| 5367134 | Circuit breaker | Toshiaki Yoshizumi, Yoshiki Hirano | 1994-11-22 |
| 5354959 | Circuit breaker | Toshiaki Yoshizumi, Yoshiki Hirano | 1994-10-11 |
| 4290922 | Ammoxidation catalyst for the production of acrylonitrile from propylene and process for producing the same | Sumio Umemura, Kyoji Ohdan, Toshio Kurafuji | 1981-09-22 |
| 4264476 | Catalyst for producing acrylonitrile in a fluidized bed reactor | Sumio Umemura, Kyoji Ohdan, Toshio Kurafuji | 1981-04-28 |
| 4205010 | Method for the catalytical production of acrylonitrile | Sumio Umemura, Kyoji Ohdan, Taizo Uda, Tokuo Matsuzaki, Yasuo Nakamura +1 more | 1980-05-27 |