Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10189058 | Apparatus for removing chips from interior of pipe using pressure difference | Min-Ho Song | 2019-01-29 |
| 7849882 | Double plug head for plugging pipe | Min-Ho Song | 2010-12-14 |
| 7338089 | Pipe interruption fitting | — | 2008-03-04 |
| 6705350 | Plug and plugging machine for pipeline fitting | — | 2004-03-16 |
| 6276878 | Horizontal cutting-type tapping machine | — | 2001-08-21 |
| 6068019 | Branch apparatus for pipe and a branch method using the same | — | 2000-05-30 |