Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |