Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6108826 | Adjustable trap for a toilet stool | Ryosuke Hayashi, Hiroshi Kobayashi, Makoto Watanabe, Hiroshi Okada, Hiroshi Tanaka +4 more | 2000-08-29 |
| 5819326 | Connecting apparatus for a toilet and a drainpipe | Hiroshi Kobayashi, Makoto Watanabe, Hiroshi Okada, Hiroshi Tanaka, Toshiaki Kayahara +3 more | 1998-10-13 |