Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7086283 | Explosion-proof portable gas detector | Shuji Tajima | 2006-08-08 |
| 6744373 | Portable gas alarm device | Shuji Tajima, Yoshiharu Ao, Masahide Kitamura | 2004-06-01 |
| 6712586 | Gas suction pump device, gas feed adapter and gas alarm unit | Shuji Tajima, Yasunori Takei, Takuo Aida | 2004-03-30 |
| D403603 | Wrist watch type gas measuring device | Haruhiko Kondo, Masahide Kitamura | 1999-01-05 |