Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858824 | Air conditioner | Kenji Matsuda, Sakuo Sugawara, Hiroyuki Umemura, Hidenori Ishioka, Katsuyuki Aoki | 1989-08-22 |
| 4807444 | Air flow control device | Katsuyuki Aoki, Hiroyuki Umemura, Tetsuji Okada, Kenji Matsuda, Hidenori Ishioka +3 more | 1989-02-28 |