Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4938167 | Self-propelled vehicle for use in pipes | Koichi Mizuho | 1990-07-03 |
| 4555948 | Method of ultrasonic flaw detection of pipe | Hirofumi Miyamoto, Junichi Sugitani, Yasumaru Taniguchi, Tetsuo Kaji | 1985-12-03 |