Inventor
YOSHIZAWA TADAO
5 patents
Patents
5 patentsUS4275909AJun 30, 1981
Flexible plastic pipe joint
KUBOTA LTD37 citations91
US4135961AJan 23, 1979
Method of molding a socket part on a synthetic resinous pipe end
KUBOTA LTD38 citations91
US4093280AJun 6, 1978
Synthetic resinous pipe joint made up in one-piece with a metallic male screw
KUBOTA LTD76 citations90
US4279853AJul 21, 1981
Method of forming a socket end on a plastic pipe and a molding device for use of the method
KUBOTA LTD22 citations79
US4412802ANov 1, 1983
Molding device for forming a socket end on a plastic pipe
KUBOTA LTD13 citations70