Inventor

KUWAVARA RYUZI

JP3 patents

Patents

3 patents

US4997556AMar 5, 1991

Oil filter I

MITSUBISHI OIL CO102 citations92

US5114575AMay 19, 1992

Oil filter

MITSUBISHI OIL CO26 citations91

US4976854ADec 11, 1990

Oil filter II

MITSUBISHI OIL CO18 citations72