Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D484223 | Water closet | Mari Ooe, Yoshitaka Mukai | 2003-12-23 |
| D432219 | Toilet seat with cover | Ayse Birsel, Noriko Hiraga, Koichi Watanabe | 2000-10-17 |
| D413658 | Combined toilet seat and cover | Ayse Birsel, Noriko Hiraga, Koichi Watanabe | 1999-09-07 |
| 5666672 | Toilet attachment with easily detachable seat | Ayse Birsel, Noriko Hiraga, Kenichi Nagato, Koichi Watanabe, Kuniaki Shinohara | 1997-09-16 |
| 5593360 | Planetary gear system | Hiroki Ishida, Hiroshi Horie | 1997-01-14 |
| 4926906 | Spool valve | Kouji Ichihashi, Katsuhiko Tsukazaki, Hiroshi Sakuyama, Nobuo Baba, Kiyoji Nakajima +2 more | 1990-05-22 |