Inventor
TANAKA MASAHIKO
JP67 patents
⚠️ This page may combine multiple inventors who share the name “TANAKA MASAHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
13 patentsUS6122486ASep 19, 2000
Transmission restricting device radio communication terminal equipment and transmission restricting system using these
NEC CORP125 citations97
US5870666AFeb 9, 1999
Radio channel estimation based on BER and RSSI
NEC CORP97 citations97
US5825761AOct 20, 1998
Radio communication equipment with transmission rate regulating function
NEC CORP107 citations97
US5566226AOct 15, 1996
Portable telephone apparatus which can be connected to an external apparatus without using an adapter
NEC CORP109 citations97
US6208855B1Mar 27, 2001
Mobile data communication system
NEC CORP30 citations93
US5754588AMay 19, 1998
Radio modem
NEC CORP20 citations93
US5617449AApr 1, 1997
IC memory card type radio modem
NEC CORP21 citations93
US6011483AJan 4, 2000
Battery built-in wireless ID card unit and ID verification unit
NEC CORP26 citations92
US5920592AJul 6, 1999
Data transmitter-receiver
NEC CORP48 citations92
US5610941AMar 11, 1997
IC card radio modem
NEC CORP29 citations92
US6219532B1Apr 17, 2001
Movable radio terminal device capable of precisely matching impedances
NEC CORP49 citations91
US6023475AFeb 8, 2000
Data packet transmission method and apparatus for practicing the same
NEC CORP11 citations73
US5329244AJul 12, 1994
Linear compensating circuit
NEC CORP19 citations73
TOSHIBA KK
10 patentsUS5513164AApr 30, 1996
Optical recording and reproducing apparatus
TOSHIBA KK61 citations96
US6154433ANov 28, 2000
Light beam shaping device to change an anisotropic beam to an isotropic beam for reducing the size of an optical head
TOSHIBA KK62 citations94
US5615200AMar 25, 1997
Light beam shaping device to change an anisotropic beam to an isotropic beam for reducing the size of an optical head
TOSHIBA KK67 citations94
US5661711AAug 26, 1997
Optical recording and reproducing apparatus
TOSHIBA KK24 citations93
US5475210ADec 12, 1995
Noise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser device
TOSHIBA KK39 citations92
US6418098B1Jul 9, 2002
Optical head apparatus for reproducing information from an optical recording medium
TOSHIBA KK12 citations73
US5835459ANov 10, 1998
Optical disc apparatus for recording and reproducing data onto and from an optical disc with grooves and lands
TOSHIBA KK9 citations73
US5740138AApr 14, 1998
Apparatus for recording information on a primary optical disk to manufacture optical disks
TOSHIBA KK12 citations73
US6167006ADec 26, 2000
Optical information recording/reproducing apparatus based on tracking control of irradiated light
TOSHIBA KK5 citations63
US5202789AApr 13, 1993
Optical system for preserving a state of polarization of light beam
TOSHIBA KK2 citations63
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
9 patentsUS6830193B2Dec 14, 2004
Non-contact IC card
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD111 citations98
US7227504B2Jun 5, 2007
Gate antenna device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD27 citations92
US7164344B2Jan 16, 2007
Non-contact IC card reading/writing apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD45 citations92
US7457637B2Nov 25, 2008
Noncontact recording medium reader/writer
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations84
US7182266B2Feb 27, 2007
Noncontact IC card reader/writer
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD17 citations83
US7070101B2Jul 4, 2006
Loop antenna and contactless IC card read/write apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations73
US7072613B2Jul 4, 2006
Wireless communication medium processing apparatus and wireless communication medium processing system
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations73
US7064716B2Jun 20, 2006
Integrated antenna type non-contact IC card reader/writer
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD6 citations63
US6994887B2Feb 7, 2006
Chemical vapor deposition apparatus and film deposition method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations63
KONICA MINOLTA INC
3 patentsUS9121974B2Sep 1, 2015
Light guide, illuminating device, and image reading apparatus
KONICA MINOLTA INC4 citations73
US10038811B2Jul 31, 2018
Image reading device and image forming device
KONICA MINOLTA INC2 citations72
US9325874B2Apr 26, 2016
Light guide, illuminating device and image reading apparatus
KONICA MINOLTA INC2 citations57
ANELVA CORP
2 patentsNEC TOKIN TOYAMA LTD
2 patentsJUKI KK
2 patentsLAM RES CORP
1 patentJAPAN GOVERNMENT
1 patentKONICA MINOLTA BUSINESS TECH
1 patentYAMAMOTO TAKASHI
1 patentOTSUKA PHARMA CO LTD
1 patentDENSO CORP
1 patentCANON ANELVA CORP
1 patentFUJITSU LTD
1 patentTANAKA MASAHIKO
1 patentShowing the top 50 of 67 patents by PatentIndex Score.