Inventor
KAWACHI OSAMU
JP56 patents
⚠️ This page may combine multiple inventors who share the name “KAWACHI OSAMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU MEDIA DEVICES LTD
22 patentsUS6498548B2Dec 24, 2002
Surface acoustic wave filter with optimized width and pitch of interdigital electrodes and reflector electrodes
FUJITSU MEDIA DEVICES LTD19 citations93
US7176599B2Feb 13, 2007
Surface acoustic wave device and method of producing the same
FUJITSU MEDIA DEVICES LTD23 citations92
US6483402B2Nov 19, 2002
Surface acoustic wave device
FUJITSU MEDIA DEVICES LTD32 citations92
US6759928B2Jul 6, 2004
Surface acoustic wave device with divided interdigital transducers
FUJITSU MEDIA DEVICES LTD56 citations90
US6469593B2Oct 22, 2002
Surface acoustic wave device, communication device using the same, and antenna duplexer
FUJITSU MEDIA DEVICES LTD31 citations90
US7215223B2May 8, 2007
Surface acoustic wave device
FUJITSU MEDIA DEVICES LTD38 citations89
US7071796B2Jul 4, 2006
Surface acoustic wave filter
FUJITSU MEDIA DEVICES LTD14 citations84
US7002438B2Feb 21, 2006
Surface acoustic wave device with reflection electrodes having pitches that vary
FUJITSU MEDIA DEVICES LTD12 citations83
US7388456B2Jun 17, 2008
Surface acoustic wave filter
FUJITSU MEDIA DEVICES LTD9 citations82
US7304417B2Dec 4, 2007
Package for electronic device, base substrate, electronic device and fabrication method thereof
FUJITSU MEDIA DEVICES LTD10 citations82
US7180388B2Feb 20, 2007
Surface acoustic wave device
FUJITSU MEDIA DEVICES LTD7 citations74
US6965282B2Nov 15, 2005
Surface acoustic wave device with two split interdigital transducers connected by specified electrode structures
FUJITSU MEDIA DEVICES LTD7 citations74
US7190241B2Mar 13, 2007
Elastic wave apparatus
FUJITSU MEDIA DEVICES LTD7 citations73
US7816794B2Oct 19, 2010
Electronic device and method of fabricating the same
FUJITSU MEDIA DEVICES LTD7 citations72
US7292122B2Nov 6, 2007
Surface acoustic wave filter and wireless device that employs the same
FUJITSU MEDIA DEVICES LTD8 citations72
US7102462B2Sep 5, 2006
Surface acoustic wave device
FUJITSU MEDIA DEVICES LTD8 citations72
US7291904B2Nov 6, 2007
Downsized package for electric wave device
FUJITSU MEDIA DEVICES LTD6 citations63
US7157991B2Jan 2, 2007
Surface acoustic wave device having reflectors with both open and shorted electrodes
FUJITSU MEDIA DEVICES LTD2 citations63
US7385468B2Jun 10, 2008
Surface acoustic wave filter
FUJITSU MEDIA DEVICES LTD2 citations61
US7795999B2Sep 14, 2010
Filter having multiple surface acoustic wave filters connected in parallel
FUJITSU MEDIA DEVICES LTD4 citations58
US7236067B2Jun 26, 2007
Surface acoustic wave filter
FUJITSU MEDIA DEVICES LTD1 citations52
US7400220B2Jul 15, 2008
Surface acoustic wave device
FUJITSU MEDIA DEVICES LTD1 citations50
FUJITSU LTD
13 patentsUS6388545B1May 14, 2002
Surface-acoustic-wave filter having an improved suppression outside a pass-band
FUJITSU LTD55 citations96
US5874869AFeb 23, 1999
Surface acoustic wave filter device on 40° to 42° rotated Y-X LITAO3
FUJITSU LTD74 citations96
US6037847AMar 14, 2000
Surface acoustic wave device using a leaky surface acoustic wave with an optimized cut angle of a piezoelectric substrate
FUJITSU LTD74 citations95
US5631515AMay 20, 1997
Surface acoustic wave device
FUJITSU LTD60 citations93
US7227429B2Jun 5, 2007
Surface acoustic wave device and method of fabricating the same
FUJITSU LTD20 citations92
US6317015B1Nov 13, 2001
Surface acoustic wave device using a leaky surface acoustic wave with an optimized cut angle of a piezoelectric substrate
FUJITSU LTD18 citations91
US7274129B2Sep 25, 2007
Surface acoustic wave device and method of fabricating the same
FUJITSU LTD10 citations84
US5963114AOct 5, 1999
Surface-acoustic-wave device having an improved pass-band characteristic and an improved degree of freedom for setting input and output impedances
FUJITSU LTD16 citations82
US6271739B1Aug 7, 2001
Surface-acoustic-wave device having an improved pass-band characteristic and an improved degree of freedom for setting input and output impedances
FUJITSU LTD8 citations73
US6114926ASep 5, 2000
Surface-acoustic-wave device having an improved pass-band characteristic and an improved degree of freedom for setting input and output impedances
FUJITSU LTD5 citations73
US6111481AAug 29, 2000
Surface-acoustic-wave three interdigital electrodes with different numbers of finger pairs
FUJITSU LTD4 citations73
US7170371B2Jan 30, 2007
Surface acoustic wave device with a thicker partial bus bar area and optimal bus bar to electrode tip gap
FUJITSU LTD3 citations63
US7233219B2Jun 19, 2007
Balanced output filter having specified package input and output ground metal patterns
FUJITSU LTD2 citations62
TAIYO YUDEN KK
10 patentsUS8018120B2Sep 13, 2011
Surface acoustic wave device and method of fabricating the same
TAIYO YUDEN KK7 citations84
US10826461B2Nov 3, 2020
Acoustic wave device
TAIYO YUDEN KK4 citations73
US9825612B2Nov 21, 2017
Multiplexer
TAIYO YUDEN KK6 citations73
US9751109B2Sep 5, 2017
Acoustic wave device and method of fabricating the same
TAIYO YUDEN KK5 citations73
US11595019B2Feb 28, 2023
Acoustic wave resonator, filter, and multiplexer
TAIYO YUDEN KK3 citations71
US10491191B2Nov 26, 2019
Acoustic wave device and method of fabricating the same
TAIYO YUDEN KK1 citations61
US10250231B2Apr 2, 2019
Acoustic wave device
TAIYO YUDEN KK1 citations58
US10187035B2Jan 22, 2019
Acoustic wave device
TAIYO YUDEN KK0 citations51
US9294068B2Mar 22, 2016
Filter circuit and module
TAIYO YUDEN KK1 citations50
US9214445B2Dec 15, 2015
Electronic component and method of fabricating the same
TAIYO YUDEN KK0 citations46
FUJITSU MEDIA DEVICES LIMTED
1 patentSAITOU YASUYUKI
1 patentMORIYA AKIRA
1 patentKAWACHI OSAMU
1 patentSAKINADA KAORU
1 patentShowing the top 50 of 56 patents by PatentIndex Score.