Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D412974 | Water closet | Koichi Watanabe | 1999-08-17 |
| 5666672 | Toilet attachment with easily detachable seat | Noriko Hiraga, Junichi Tani, Kenichi Nagato, Koichi Watanabe, Kuniaki Shinohara | 1997-09-16 |
| D383833 | Water closet | Koichi Watanabe | 1997-09-16 |
| D381961 | Remote controller | Koichi Watanabe | 1997-08-05 |
| D382046 | Water closet | Koichi Watanabe | 1997-08-05 |
| D381408 | Water closet | Koichi Watanabe | 1997-07-22 |