Inventor
SHIBAGAKI NOBUHIKO
JP21 patents
⚠️ This page may combine multiple inventors who share the name “SHIBAGAKI NOBUHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI MEDIA ELECTRON KK
10 patentsUS6766149B1Jul 20, 2004
Mobile radio terminal and surface acoustic wave antenna duplexer
HITACHI MEDIA ELECTRON KK73 citations97
US6714099B2Mar 30, 2004
Radio frequency filter, radio frequency circuit, antenna duplexer and radio terminal
HITACHI MEDIA ELECTRON KK74 citations97
US6525624B1Feb 25, 2003
Band-switchable surface acoustic wave antenna duplexer and mobile radio terminal
HITACHI MEDIA ELECTRON KK62 citations95
US7489063B2Feb 10, 2009
Thin film piezoelectric bulk acoustic wave resonator and radio frequency filter using the same
HITACHI MEDIA ELECTRON KK43 citations92
US5666091ASep 9, 1997
Structure of surface acoustic wave filter
HITACHI MEDIA ELECTRON KK34 citations92
US7561010B2Jul 14, 2009
Piezoelectric thin film resonators
HITACHI MEDIA ELECTRON KK19 citations84
US7385464B2Jun 10, 2008
Resonator type filter
HITACHI MEDIA ELECTRON KK13 citations84
US7659795B2Feb 9, 2010
Antenna duplexer and wireless terminal using the same
HITACHI MEDIA ELECTRON KK11 citations83
US7499678B2Mar 3, 2009
Antenna sharing device and wireless communication terminal using the same
HITACHI MEDIA ELECTRON KK12 citations83
US7586390B2Sep 8, 2009
Bulk acoustic wave resonator, bulk acoustic wave filter, RF module including bulk acoustic wave resonator and/or filter, and bulk acoustic wave oscillator
HITACHI MEDIA ELECTRON KK6 citations63
HITACHI LTD
9 patentsUS5438305AAug 1, 1995
High frequency module including a flexible substrate
HITACHI LTD106 citations96
US5202652AApr 13, 1993
Surface acoustic wave filter device formed on a plurality of piezoelectric substrates
HITACHI LTD94 citations95
US5115216AMay 19, 1992
Surface acoustic wave filter including saw resonators with transmission spaces therein
HITACHI LTD38 citations92
US5422615AJun 6, 1995
High frequency circuit device
HITACHI LTD51 citations89
US6047306AApr 4, 2000
CDMA communication RF signal processing apparatus using SAW
HITACHI LTD19 citations84
US5065065ANov 12, 1991
Surface acoustic wave device
HITACHI LTD14 citations73
US5087901AFeb 11, 1992
Surface acoustic wave band-pass filter with different phase weighted transducers
HITACHI LTD6 citations62
US7915793B2Mar 29, 2011
Thin film tuning-fork type inflection resonator and electric signal processing element
HITACHI LTD0 citations52
US5235234AAug 10, 1993
Surface acoustic wave device
HITACHI LTD1 citations51