Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4444156 | Water heater | Yasutaka Iwasaki, Mitsuru Tanaka, Akihiko Yasuda, Toshihiko Kikuchi, Masao Maruyama | 1984-04-24 |
| 4325772 | Method of internally lining an installed pipe | Tetsui Suetoshi, Koichi Hosoya, Mitsuo Yamamoto | 1982-04-20 |