Inventor
ISHIDO YOSHINOBU
JP3 patents
Patents
3 patentsUS4449713AMay 22, 1984
Aqueously-swelling water stopper and a process of stopping water thereby
HAYAKAWA RUBBER104 citations95
US4443019AApr 17, 1984
Aqueously-swelling water stopper and a process of stopping water thereby
HAYAKAWA RUBBER37 citations94
US4366284ADec 28, 1982
Aqueously-swelling water stopper and a process of stopping water thereby
HAYAKAWA RUBBER40 citations94