| 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 |
