Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4436505 | Device for detecting flame in open-type combustor and oxygen density of indoor air | Hiroshi Yamaguchi | 1984-03-13 |
| 4412809 | Oxygen density detecting device in combustor | Hiroshi Yamaguchi, Takashi Sekiguchi, Hideyuki Tsukahara, Kisuke Fujita | 1983-11-01 |