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Ryuhei Fujiwara
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Apparatus, system, method, and program for visible light communication
Patent number
8,019,229
Issue date
Sep 13, 2011
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Visible light control apparatus, visible light control circuit, vis...
Patent number
7,742,704
Issue date
Jun 22, 2010
NEC Corporation
Shuuji Suzuki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Mobile telephone using subscriber card
Patent number
7,151,922
Issue date
Dec 19, 2006
NEC Corporation
Toshiyuki Sashihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Data distribution method, system, and apparatus and recording mediu...
Patent number
7,065,551
Issue date
Jun 20, 2006
NEC Corporation
Kenichi Ariga
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Service identification tag and communications system using the same
Patent number
6,950,938
Issue date
Sep 27, 2005
NEC Corporation
Ryuhei Fujiwara
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Communication system capable of reducing communication load
Patent number
6,882,840
Issue date
Apr 19, 2005
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Automatic call making system and a mobile radio terminal
Patent number
6,647,263
Issue date
Nov 11, 2003
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio information terminal capable of facilitating on-line operatio...
Patent number
6,567,674
Issue date
May 20, 2003
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Voice mail system
Patent number
6,157,827
Issue date
Dec 5, 2000
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio packet communication system capable of avoiding transmission...
Patent number
6,091,741
Issue date
Jul 18, 2000
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio broadcast system with improved reception of an NAK code
Patent number
6,016,567
Issue date
Jan 18, 2000
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and device employing location confirmation by a server or a...
Patent number
5,968,123
Issue date
Oct 19, 1999
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio conference system and terminal unit therefor
Patent number
5,915,211
Issue date
Jun 22, 1999
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Echo suppressor capable of suppressing an echo resulting from acous...
Patent number
5,790,657
Issue date
Aug 4, 1998
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Speech decoding apparatus comprising alarm signal generator operabl...
Patent number
5,553,080
Issue date
Sep 3, 1996
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Power conserving mobile telephone usable as a portable phone and as...
Patent number
5,353,330
Issue date
Oct 4, 1994
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Portable radio telephone set for generating pattern signals represe...
Patent number
5,301,222
Issue date
Apr 5, 1994
NEC Corporation
Ryuhei Fujiwara
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Speech recognition method with noise reduction and a system therefor
Patent number
5,201,004
Issue date
Apr 6, 1993
NEC Corporation
Ryuhei Fujiwara
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Phase-locked loop synthesizer for use in TDM communications system
Patent number
5,175,511
Issue date
Dec 29, 1992
NEC Corporation
Ryuhei Fujiwara
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Apparatus for controlling a power supply of an electric machine in...
Patent number
5,157,271
Issue date
Oct 20, 1992
NEC Corporation
Ryuhei Fujiwara
G05 - CONTROLLING REGULATING
Information
Patent Grant
Two-battery supply for operating and waiting modes of a carphone
Patent number
5,149,985
Issue date
Sep 22, 1992
NEC Corporation
Ryuhei Fujiwara
B60 - VEHICLES IN GENERAL
Information
Patent Grant
Management system capable of quickly assigning a terminal endpoint...
Patent number
5,125,082
Issue date
Jun 23, 1992
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ISDN network termination unit enabling to establish data link betwe...
Patent number
4,999,836
Issue date
Mar 12, 1991
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ISDN system having subscriber line multiplexer with means for estab...
Patent number
4,985,891
Issue date
Jan 15, 1991
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio communication system with power saving disablement prior to c...
Patent number
4,794,649
Issue date
Dec 27, 1988
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multiple access communication system having loop-check circuitry fo...
Patent number
4,756,018
Issue date
Jul 5, 1988
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
System for adjusting a time axis by using a control and an adjustme...
Patent number
4,513,416
Issue date
Apr 23, 1985
Nippon Electric Co., Ltd.
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Circuit arrangement for protecting a control channel from jamming w...
Patent number
4,434,506
Issue date
Feb 28, 1984
Nippon Electric Co., Ltd.
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
DATA COLLECTION SYSTEM, MOBILE TERMINAL, STICKER, AND DATA COLLECTI...
Publication number
20120205440
Publication date
Aug 16, 2012
NEC Corporation
Ryuhei Fujiwara
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
CONNECTION PARAMETER SETTING SYSTEM, METHOD THEREOF, ACCESS POINT,...
Publication number
20090055541
Publication date
Feb 26, 2009
NEC Corporation
Naoki Sato
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
HIGH-SPEED OPTICAL COMMUNICATION
Publication number
20080285979
Publication date
Nov 20, 2008
NEC Corporation
Shuji SUZUKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
APPARATUS, SYSTEM, METHOD, AND PROGRAM FOR VISIBLE LIGHT COMMUNICATION
Publication number
20070147843
Publication date
Jun 28, 2007
RYUHEI FUJIWARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Visible light control apparatus, visible light control circuit, vis...
Publication number
20070092264
Publication date
Apr 26, 2007
NEC Corporation
Shuuji Suzuki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Mobile telephone using subscriber card
Publication number
20020165008
Publication date
Nov 7, 2002
NEC Corporation
Toshiyuki Sashihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
AUTOMATIC CALL MAKING SYSTEM AND A MOBILE RADIO TERMINAL
Publication number
20020151277
Publication date
Oct 17, 2002
RYUHEI FUJIWARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Data distribution method, system, and apparatus and recording mediu...
Publication number
20020055877
Publication date
May 9, 2002
NEC Corporation
Kenichi Ariga
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Communication system capable of reducing communication load
Publication number
20020002047
Publication date
Jan 3, 2002
NEC Corporation
Ryuhei Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE