Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872762 | Method and apparatus for detecting defective portion on inner surface of pipe | Toshio Koshihara, Rokurou Misawa, Yuzo Sagawa, Kimio Takehara, Yuji Matoba | 1989-10-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872762 | Method and apparatus for detecting defective portion on inner surface of pipe | Toshio Koshihara, Rokurou Misawa, Yuzo Sagawa, Kimio Takehara, Yuji Matoba | 1989-10-10 |