Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821526 | Air conditioning apparatus | Nobuo Otsuka, Hideo Igarashi | 1989-04-18 |
| 4819714 | Air conditioning apparatus | Nobuo Otsuka, Seiji Wada | 1989-04-11 |
| 4811897 | Duct type air conditioning system | Toyohiro Kobayashi, Nobuo Otsuka | 1989-03-14 |
| 4795088 | Air conditioning system | Toyohiro Kobayashi, Nobuo Otsuka, Larry J. Stratton | 1989-01-03 |