Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5835220 | Method and apparatus for detecting surface flaws | Akira Kazama, Takahiko Oshige, Tsutomu Kawamura | 1998-11-10 |
| 5403436 | Plasma treating method using hydrogen gas | Shuzo Fujimura, Tetsuya Takeuchi, Takeshi Miyanaga, Yoshimasa Nakano | 1995-04-04 |
| 4988210 | Method and apparatus for detecting defective portion on outer surface of pipe | Toshio Koshihara, Koji Ishihara, Toru Hirashima, Shunichiro Ishida, Haruhito Okamoto | 1991-01-29 |
| 4983836 | Method for detecting thinned out portion on inner surface or outer surface of pipe | Toshio Koshihara | 1991-01-08 |
| 4872762 | Method and apparatus for detecting defective portion on inner surface of pipe | Toshio Koshihara, Rokurou Misawa, Yuzo Sagawa, Kimio Takehara, Koji Ishihara | 1989-10-10 |