Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6367849 | Joint for corrugated pipe | Kazuya Yamashita, Takeshi Mochiduki, Kentaro Takenaka | 2002-04-09 |
| 6209929 | Connector for mounting a spiral pipe onto a wall member | Hiroshi Ikegami, Yasuhiro Kikumori, Noboru Someda, Toshifumi Fujiwara, Toshio Morimatsu | 2001-04-03 |
| 6131616 | Corrugated synthetic resin pipe | Kazuya Yamashita, Takeshi Mochizuki, Kazumasa Nakayama | 2000-10-17 |
| 6024130 | Synthetic resin pipe | Yoshihisa Tateishi | 2000-02-15 |