Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5394659 | Openable and closeable roof construction | Mamoru Kawaguchi, Toshimasa Hirasawa | 1995-03-07 |
| 5371983 | Dome shaped roof structure | Mamoru Kawaguchi, Toshimasa Hirasawa, Akira Taga, Ikuo Tatemichi | 1994-12-13 |
| 5257485 | Openable and closeable roof construction | Mamoru Kawaguchi, Toshimasa Hirasawa, Kaoru Yamada, Akira Taga | 1993-11-02 |