Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6021833 | Manufacturing line for multi-layered printed circuit boards | Katsumi Uchikawa, Keiji Arai, Kouji Takamachi, Tohru Matsui, Ryo Fujita +5 more | 2000-02-08 |
| 5221160 | Subterranean connecting method for construction of shield tunnel and connecting apparatus therefor | Youji Azuma, Hisao Arai, Kazuo Isaka, Hiroyuki Kubo, Tokuharu Nakajima +13 more | 1993-06-22 |