Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4593722 | Sealant for internally sealing pipeline | Mitsuo Yamamoto, Namio Kinumoto, Toshinori Tsuji | 1986-06-10 |
| 4554178 | Method of internally coating pipeline | Mitsuo Yamamoto, Namio Kinumoto, Toshinori Tsuji | 1985-11-19 |