Inventor
KAWAI HIROTAKA
JP23 patents
⚠️ This page may combine multiple inventors who share the name “KAWAI HIROTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FDK CORP
10 patentsUS6417952B1Jul 9, 2002
Faraday rotation angle varying device
FDK CORP11 citations73
US6288827B1Sep 11, 2001
Faraday rotator
FDK CORP10 citations72
US6108120AAug 22, 2000
Faraday rotation angle varying apparatus
FDK CORP9 citations72
US7006273B2Feb 28, 2006
Faraday rotation device and optical device using same
FDK CORP9 citations71
US6876480B2Apr 5, 2005
Farady rotation device and optical device comprising it
FDK CORP7 citations71
US6906843B2Jun 14, 2005
Ferrule attachment type optical isolator, and manufacturing method thereof
FDK CORP6 citations62
US5965287AOct 12, 1999
Magneto-optical element material and Faraday element using the same
FDK CORP5 citations61
US5566017AOct 15, 1996
Material for magneto-optical element and faraday rotator using the same
FDK CORP5 citations61
US7336418B1Feb 26, 2008
Optical attenuator
FDK CORP4 citations60
US5547613AAug 20, 1996
Magneto-optical element material formed of magnetic garnet single crystals
FDK CORP3 citations57
YAMAHA CORP
9 patentsUS7948313B2May 24, 2011
Class D amplifier circuit
YAMAHA CORP14 citations84
US7679435B2Mar 16, 2010
Digital input class-D amplifier
YAMAHA CORP16 citations84
US7924089B2Apr 12, 2011
Offset voltage correction circuit and class D amplifier
YAMAHA CORP7 citations83
US7920082B2Apr 5, 2011
D/A converter circuit and digital input class-D amplifier
YAMAHA CORP16 citations83
US7816992B2Oct 19, 2010
Offset voltage correction circuit and class D amplifier
YAMAHA CORP11 citations83
US7830182B2Nov 9, 2010
Comparator
YAMAHA CORP5 citations62
US7990211B2Aug 2, 2011
Class D amplifier circuit
YAMAHA CORP1 citations51
US7982522B2Jul 19, 2011
Semiconductor integrated circuit for realizing an amplifier having ringing reduction circuitry
YAMAHA CORP0 citations42
US7912112B2Mar 22, 2011
Spectrum spreading circuit
YAMAHA CORP0 citations41