Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6219965 | Plant growth sheet structure, natural turf sheet structure, method of growing turf and method of laying turf sheet structure | Yoshio Ishikawa, Hiroaki Fukumoto, Toshimasa Hirasawa, Tatsuo Hatado, Kaoru Yamada | 2001-04-24 |
| 5371983 | Dome shaped roof structure | Mamoru Kawaguchi, Toshimasa Hirasawa, Tatsuo Hatato, Ikuo Tatemichi | 1994-12-13 |
| 5257485 | Openable and closeable roof construction | Mamoru Kawaguchi, Toshimasa Hirasawa, Tatsuo Hatato, Kaoru Yamada | 1993-11-02 |
| 5091855 | Operation control system for automated guide vehicles | Shigeru Umehara, Ikumitsu Kohara, Satoshi Kaseda, Masao Kawase, Yoshito Kato +2 more | 1992-02-25 |