Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5062409 | Hot-air furnace | Yoshio Kakuta | 1991-11-05 |
| 4556103 | Heat exchange apparatus with blower and helical conduit system | Masatoshi Kuwa, Toshio Nihei | 1985-12-03 |
| 4454862 | Warmer apparatus for horticulture facilities utilizing solar heat | — | 1984-06-19 |