| 5089297 |
Method for repairing interior portions of a pipeline |
Nobukatsu Ike, Kenji Ohshima |
1992-02-18 |
| 4584963 |
System for repairing joints in pipes laid underground |
Akio Morinaga, Mitsutoshi Hayashi |
1986-04-29 |
| 4556580 |
Method of repairing pipes laid underground |
Takashi Kamuro, Hisao Ootsuga, Isao Saito |
1985-12-03 |
| 4505613 |
Method for lining pipes in pipelines |
— |
1985-03-19 |
| 4504204 |
Pig for repairing interior portions of a pipeline |
— |
1985-03-12 |
| 4454173 |
Method for lining pipes in a pipeline |
— |
1984-06-12 |
| 4454174 |
Method for lining pipes of a pipeline |
— |
1984-06-12 |
| 4346922 |
Device for preventing leakage at pipe joints |
Hisao Ohtsuga, Koji Uzawa, Takashi Kamuro, Susumu Sudo, Tomoyoshi Hirose +1 more |
1982-08-31 |