Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5058804 | Automatic hot water supply apparatus | Hiroaki Yonekubo, Risho Miyoshi, Katsumi Hirata, Takashi Iwasa | 1991-10-22 |
| 4896658 | Hot water supply system | Hiroaki Yonekubo, Yasuo Kidouchi, Yasukiyo Ueda | 1990-01-30 |