Inventor
YOKOYAMA YUKIO
JP40 patents
⚠️ This page may combine multiple inventors who share the name “YOKOYAMA YUKIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
14 patentsUS4641366AFeb 3, 1987
Portable radio communication apparatus comprising an antenna member for a broad-band signal
NEC CORP176 citations99
US5375256ADec 20, 1994
Broadband radio transceiver
NEC CORP84 citations96
US5394160AFeb 28, 1995
Portable radio with coplanar ground and atenna conductive films formed on the inner surface of the case
NEC CORP46 citations93
US5493311AFeb 20, 1996
Two-frequency impedance matching circuit for an antenna
NEC CORP32 citations92
US5438339AAug 1, 1995
Antenna for a radio communication apparatus
NEC CORP24 citations92
US5392461AFeb 21, 1995
Portable radio communication apparatus unnecessitating shielding case
NEC CORP52 citations92
US5148181ASep 15, 1992
Mobile radio communication apparatus
NEC CORP39 citations92
US5053943AOct 1, 1991
Control circuit for autonomous counters of a plurality of cpu's or the like with intermittent operation and reset after a predetermined count
NEC CORP39 citations92
US4791423ADec 13, 1988
Shorted microstrip antenna with multiple ground planes
NEC CORP40 citations92
US4680553AJul 14, 1987
Intermediate frequency amplifier with signal strength detection circuit
NEC CORP26 citations92
US4644361AFeb 17, 1987
Combination microstrip and unipole antenna
NEC CORP30 citations92
US5926140AJul 20, 1999
Antenna for portable radio unit
NEC CORP7 citations74
US5455595AOct 3, 1995
Antenna for portable radio communication apparatus
NEC CORP17 citations73
US8385578B2Feb 26, 2013
Piezoelectric acoustic device and electronic apparatus
NEC CORP3 citations62
CANON KK
11 patentsUS6396858B2May 28, 2002
Laser driving method and apparatus and image-forming apparatus
CANON KK23 citations92
US6266078B1Jul 24, 2001
Image forming apparatus
CANON KK26 citations92
US7509063B2Mar 24, 2009
Adjustment mode control method and apparatus for performing the same
CANON KK7 citations74
US6347105B1Feb 12, 2002
Laser control apparatus with a current detecting and interrupting system
CANON KK8 citations73
US7912391B2Mar 22, 2011
Image-heating device with a first heating member and an adjustable second heating member
CANON KK2 citations63
US7593658B2Sep 22, 2009
Image forming apparatus
CANON KK3 citations63
US7587151B2Sep 8, 2009
Image forming apparatus which excutes check mode prior to ordinary image formation
CANON KK5 citations63
US7471910B2Dec 30, 2008
Image forming apparatus and gloss level control method
CANON KK3 citations63
US7412182B2Aug 12, 2008
Image forming apparatus with setting of an operating condition of at least one image heating device
CANON KK2 citations63
US7639962B2Dec 29, 2009
Image forming apparatus with manual setting of an operating condition of at least one image heating device
CANON KK1 citations52
US6730854B2May 4, 2004
Resin-formed substrate and resin-formed substrate unit
CANON KK1 citations52
DAIICHI SEIYAKU CO
8 patentsUS5576343ANov 19, 1996
Aromatic amidine derivatives and salts thereof
DAIICHI SEIYAKU CO54 citations93
US5962695AOct 5, 1999
Aromatic amidine derivatives and salts thereof
DAIICHI SEIYAKU CO4 citations71
US5620991AApr 15, 1997
Aromatic amidine derivatives and salts thereof
DAIICHI SEIYAKU CO5 citations71
US6342609B2Jan 29, 2002
Process for preparing 3-(7-amidino-2-naphthyl)-2-phenylpropionic acid derivatives
DAIICHI SEIYAKU CO5 citations63
US6337405B1Jan 8, 2002
Process for preparing 2-phenyl-3-naphthylpropionic acid derivatives
DAIICHI SEIYAKU CO1 citations62
US6252088B1Jun 26, 2001
Process for preparing 2-phenyl-3-naphthylpropionic acid derivatives
DAIICHI SEIYAKU CO1 citations62
US6515142B2Feb 4, 2003
Process for preparing 2-phenyl-3-naphthylpropionic acid derivatives
DAIICHI SEIYAKU CO0 citations52
US5866577AFeb 2, 1999
Aromatic amidine derivatives and salts thereof
DAIICHI SEIYAKU CO0 citations49