Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6292956 | Water flush toilet bowl and a cast molding apparatus thereof | — | 2001-09-25 |
| 6108826 | Adjustable trap for a toilet stool | Ryosuke Hayashi, Hiroshi Kobayashi, Makoto Watanabe, Hiroshi Okada, Hiroshi Tanaka +4 more | 2000-08-29 |
| 5933878 | Tank device for flushing toilet bowl | Katsuyuki Suehiro, Shinji Shibata | 1999-08-10 |
| 5819326 | Connecting apparatus for a toilet and a drainpipe | Hiroshi Kobayashi, Makoto Watanabe, Hiroshi Okada, Hiroshi Tanaka, Katsuyuki Suehiro +3 more | 1998-10-13 |