Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6744373 | Portable gas alarm device | Junichi Koyano, Shuji Tajima, Yoshiharu Ao | 2004-06-01 |
| 6606897 | Portable gas detector and its cradle | Juniti Koyano, Shuji Tajima | 2003-08-19 |
| D447974 | Portable gas detector-alarm | Juniti Koyano, Shuji Tajima | 2001-09-18 |
| D403603 | Wrist watch type gas measuring device | Haruhiko Kondo, Junichi Koyano | 1999-01-05 |