Inventor
YAMAGISHI MAKOTO
JP27 patents
⚠️ This page may combine multiple inventors who share the name “YAMAGISHI MAKOTO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
15 patentsUS4742887AMay 10, 1988
Open-air type earphone
SONY CORP330 citations99
US4646872AMar 3, 1987
Earphone
SONY CORP293 citations99
US4965838AOct 23, 1990
Ear piece transducer
SONY CORP195 citations98
US6307943B1Oct 23, 2001
Electro-acoustic transducer and housing
SONY CORP55 citations96
US5459290AOct 17, 1995
Acoustic transducer and acoustic transducing system
SONY CORP84 citations96
US6356643B2Mar 12, 2002
Electro-acoustic transducer
SONY CORP58 citations95
US6175637B1Jan 16, 2001
Acoustic transducer
SONY CORP80 citations95
US5802194ASep 1, 1998
Stereo loudspeaker system with tweeters mounted on rotatable enlongated arms
SONY CORP61 citations94
US4981194AJan 1, 1991
Electro-acoustic transducer
SONY CORP102 citations94
US6057659AMay 2, 2000
Speaker apparatus
SONY CORP53 citations92
US5835612ANov 10, 1998
Speaker apparatus
SONY CORP44 citations91
US5115473AMay 19, 1992
Transducer having two ducts
SONY CORP24 citations91
US5048092ASep 10, 1991
Electroacoustic transducer apparatus
SONY CORP109 citations91
US7184562B2Feb 27, 2007
Loudspeaker apparatus
SONY CORP14 citations84
US6035052AMar 7, 2000
Acoustic transducer
SONY CORP17 citations83
YAMAGISHI MAKOTO
6 patentsUS8213632B2Jul 3, 2012
Electroacoustic transducer and ear speaker device
YAMAGISHI MAKOTO21 citations92
US8538059B2Sep 17, 2013
Ear speaker device
YAMAGISHI MAKOTO16 citations90
US8175316B2May 8, 2012
Ear speaker device
YAMAGISHI MAKOTO18 citations90
US8660288B2Feb 25, 2014
Twin driver earphone
YAMAGISHI MAKOTO2 citations62
US8885865B2Nov 11, 2014
Earphone
YAMAGISHI MAKOTO1 citations51
US8254613B2Aug 28, 2012
Speaker apparatus
YAMAGISHI MAKOTO0 citations51