Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5623793 | Permanent form for placing basement concrete wall | Masayuki Sakaguchi, Michio Watanabe, Kazutaka Takada, Hiromasa Kawamura, Shunji Horinaka +3 more | 1997-04-29 |
| 5338920 | Method of manufacturing and joining electro-fusion fitting | Shigeru Okusaka, Hideki Kasa, Masayuki Sakaguchi, Takashi Tago | 1994-08-16 |
| 4898705 | Method for producing synthetic resin union joint | Masayuki Sakaguchi, Hiroto Fujii | 1990-02-06 |
| 4845819 | Method for coupling two plastic constructive parts used in valve, joint and pipe devices | Masayuki Sakaguchi, Hideki Kajiwara, Keiji Matsumoto, Kenzo Nishitani, Yoshinori Kawamura +2 more | 1989-07-11 |
| 4412802 | Molding device for forming a socket end on a plastic pipe | Ryozo Ohta, Tadao Yoshizawa, Masayuki Sakaguchi, Yoshiaki Hara, Ryuichi Yoneda +1 more | 1983-11-01 |
| 4279853 | Method of forming a socket end on a plastic pipe and a molding device for use of the method | Ryozo Ohta, Tadao Yoshizawa, Masayuki Sakaguchi, Yoshiaki Hara, Ryuichi Yoneda +1 more | 1981-07-21 |