Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6156187 | Electrolytic integrated polishing method for external surface of metallic tubes and photosensitive drum substrate prepared thereby | Kazuo Akagi, Akira Hashimoto, Masafumi TOMITA | 2000-12-05 |
| 5221160 | Subterranean connecting method for construction of shield tunnel and connecting apparatus therefor | Hisao Arai, Kazuo Isaka, Hiroyuki Kubo, Tohru Goto, Tokuharu Nakajima +13 more | 1993-06-22 |