Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4627416 | Water heater | Hiroshi Ito, Kanae Aida, Masanobu Shinozaki, Masahiko Koumura, Kazumi Tamada | 1986-12-09 |
| 4505253 | Water heater | Sueo Mizuno, Masahiko Koumura | 1985-03-19 |