Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4775102 | Space heating system utilizing engine exhaust heat | Toshiaki Nagashima, Hideaki Nakagawa | 1988-10-04 |
| 4667876 | System for heating interior spaces of engine-driven vehicles | — | 1987-05-26 |