Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848214 | Supply and return air plenum unit for duct air-conditioning systems | Shigeo Tanaka | 1989-07-18 |
| 4828019 | Indoor unit for room air conditioners and air conditioning system using the same | Yutaka Ishizuka | 1989-05-09 |
| 4805418 | Indoor unit for room air conditioners | Yutaka Ishizuka | 1989-02-21 |