Inventor

SUMITA ISAO

3 patents

Patents

3 patents

US4214994AJul 29, 1980

Reverse osmosis membrane

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD89 citations94

US4309482AJan 5, 1982

Magnetic recording medium

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD17 citations72

US4046704ASep 6, 1977

High polymer electret

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations57