Inventor
UGAJI MASANA
7 patents
Patents
7 patentsUS5525890AJun 11, 1996
Battery unit and battery energy billing method
SONY CORP65 citations95
US4281223AJul 28, 1981
Electro-acoustic transducer
SONY CORP76 citations93
US4276452AJun 30, 1981
Membrane type electro-acoustic transducer
SONY CORP19 citations81
US4618591AOct 21, 1986
Silicon carbide-carbon composite molded product and process for manufacturing the same
SONY CORP23 citations80
US4275278AJun 23, 1981
Diaphragm for a loudspeaker
SONY CORP24 citations80
US4726443AFeb 23, 1988
Diaphragm
SONY CORP13 citations71
US4696827ASep 29, 1987
Silicon carbide-carbon composite molded product and process for manufacturing the same
SONY CORP15 citations71