Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5178485 | Heat exchanging pipe system for uniformly heating road surfaces and the like | Kohei Katsuragi | 1993-01-12 |
| 5062736 | Snow melting method utilizing heat retaining function of underground aquifer without sprinkling water | Kohei Katsuragi | 1991-11-05 |