Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6453933 | Container valve | Akira Oi, Masaru Takeda | 2002-09-24 |
| 5738145 | Valve assembly for gas cylinder | Keitaro Yonezawa, Masakatsu Kawahara, Noriaki Arai, Teruo Hatori | 1998-04-14 |
| 4928919 | Stop valve | Masakatsu Kawahara, Jiro Nitta, Koji Miyazaki, Keitaro Yonezawa | 1990-05-29 |
| 4341245 | Gas inlet attachment for a gas charger | Keitaro Yonezawa | 1982-07-27 |