HK

Harumitsu Kato

TK Trio Kabushiki Kaisha: 1 patents #22 of 70Top 35%
Overall (All Time): #4,060,396 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4413703 Bass-reflex type speaker system Hironori Yamada, Kaoru Yamazaki, Masashi Maruyama, Takashi Ogasawara 1983-11-08