Inventor

HAMANAKA HIROSHI

JP2 patents

Patents

2 patents

US6944309B2Sep 13, 2005

Headphone system

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD30 citations91

US4939601AJul 3, 1990

Playback apparatus having a single mode selecting pushbutton

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD44 citations89