Inventor

DEMUKAI TSUNEYASU

JP2 patents

Patents

2 patents

US8090134B2Jan 3, 2012

Earphone device, sound tube forming a part of earphone device and sound generating apparatus

TAKIGAWA SOUICHI60 citations93

US8270657B2Sep 18, 2012

Earphone device and sound generating apparatus equipped with the same

TAKIGAWA SOUICHI8 citations80