Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5161280 | Windshield wiper with variable arm pressure | Kazuhiro Sumiya, Tokihiko Yamamoto, Ryoichi Fukumoto, Kazuhide Itagaki | 1992-11-10 |
| 5090081 | Windshield wiper with variable arcuate pattern | Tokihiko Yamamoto, Ryoichi Fukumoto, Kazuhide Itagaki, Kazuhiro Sumiya | 1992-02-25 |
| 4934748 | Door lock apparatus | Shigeru Hayakawa, Yoshimasa Ishiguro | 1990-06-19 |
| 4902058 | Door lock | Yoshimasa Ishiguro | 1990-02-20 |