Inventor
OHTA YOSHIZUMI
JP11 patents
Patents
11 patentsUS6400825B1Jun 4, 2002
Microspeaker
CITIZEN ELECTRONICS38 citations92
US7181040B2Feb 20, 2007
Case for containing electrical instrument
CITIZEN ELECTRONICS25 citations91
USD446785SAug 21, 2001
Loudspeaker with a socket
CITIZEN ELECTRONICS31 citations91
US6208238B1Mar 27, 2001
Electromagnetic sound generating body
CITIZEN ELECTRONICS26 citations91
US6845168B2Jan 18, 2005
Speaker for an electronic instrument
CITIZEN ELECTRONICS7 citations73
US6751332B2Jun 15, 2004
Speaker
CITIZEN ELECTRONICS9 citations73
US6476710B2Nov 5, 2002
Electromagnetic sound generator
CITIZEN ELECTRONICS8 citations72
US6690809B2Feb 10, 2004
Microspeaker
CITIZEN ELECTRONICS4 citations62
US6795563B2Sep 21, 2004
Speaker for an electronic instrument
CITIZEN ELECTRONICS3 citations61
US6504940B2Jan 7, 2003
Connecting device for connecting a sound producing device to an electronic equipment
CITIZEN ELECTRONICS5 citations61
US7010142B2Mar 7, 2006
Electrical acoustic converter
CITIZEN ELECTRONICS4 citations58