Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5390939 | Joint sealing member | Hiroshi Shinjo, Kazuhiro Takasaki, Takahide Kameda | 1995-02-21 |
| 5290045 | Seal for joint, and method of installing same seal | Masanori Shimoguchi, Takahide Kameda, Svein Jonsson | 1994-03-01 |
| 5172919 | Appliance for preventing water from leaking through joint | Kazuhiro Takasaki, Hiroshi Shinjo | 1992-12-22 |
| 4740404 | Waterstop | Shozo Otsugu, Hiroharu Sasayama, Yuji Ishihara, Takashi Kushida | 1988-04-26 |