Inventor
HAGIWARA SUMIO
5 patents
Patents
5 patentsUS5233664AAug 3, 1993
Speaker system and method of controlling directivity thereof
PIONEER ELECTRONIC CORP123 citations96
US4366205ADec 28, 1982
Tone-arm elements
PIONEER ELECTRONIC CORP10 citations72
US4343376AAug 10, 1982
Vibratory elements for audio equipment
PIONEER ELECTRONIC CORP13 citations72
US4404315ASep 13, 1983
Molding compositions and diaphragms, arm pipes and head shells molded therefrom
PIONEER ELECTRONIC CORP13 citations69
US4362772ADec 7, 1982
Vibratory elements for audio equipment
PIONEER ELECTRONIC CORP5 citations61