Inventor

NIGUCHI HIROTOSHI

JP4 patents

Patents

4 patents

US5118541AJun 2, 1992

Erasable optical disk media and method of recording/erasing the same

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD66 citations95

US4140203AFeb 20, 1979

Acoustic diaphragm with polyurethane elastomer coating

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD102 citations93

US4291781ASep 29, 1981

Speaker diaphragm and method of preparation of the same

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD39 citations89

US4173701ANov 6, 1979

Speaker diaphragm molded from poly-biphenol phthalate type resin film

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations71