Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4950446 | Method of lining pipes | Toshihiko Kikuchi, Akeshi Kegasa | 1990-08-21 |
| 4593722 | Sealant for internally sealing pipeline | Mitsuo Yamamoto, Toshinori Tsuji, Tutomu Hiraoka | 1986-06-10 |
| 4554178 | Method of internally coating pipeline | Mitsuo Yamamoto, Toshinori Tsuji, Tutomu Hiraoka | 1985-11-19 |
| 4440194 | Moving body and method of performing work within pipes with use of same | Takashi Nakao, Hiroshi Murase, Shigemitsu Okada, Shinichi Kawadoko | 1984-04-03 |
| 4397890 | Method of lining pipes | Takashi Nakao, Hiroshi Murase | 1983-08-09 |