Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5519494 | Pipe inner surface measuring method and apparatus | Masaru Akamatsu, Norio Suzuki, Satoshi Yanai | 1996-05-21 |
| 5041786 | Method of nondestructively inspecting for flaws in metal stocks including selection of detection coil diameter. | Kazuhide Takaishi, Akira Saeki, Toshiki Kadonaga | 1991-08-20 |
| 4571986 | Pipe leak detector | Toshimitsu Nishimura | 1986-02-25 |
| 4398552 | Apparatus for pickling the inner wall of tubular material | Yoshiro Tanaka, Kazuo Akagi, Ryujiro Shitamatsu | 1983-08-16 |