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Hiroyuki Akiyama
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Multi-hop wireless communication system
Patent number
8,175,048
Issue date
May 8, 2012
Lapis Semiconductor Co., Ltd.
Hiroyuki Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Handover method in wireless LAN by assigning an identification code...
Patent number
7,577,434
Issue date
Aug 18, 2009
Oki Semiconductor Co., Ltd.
Yoshihisa Nakano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wireless communication apparatus
Patent number
7,356,335
Issue date
Apr 8, 2008
Oki Electric Industry Co., Ltd.
Hiroyuki Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication apparatus, communication method and installation meth...
Patent number
7,336,156
Issue date
Feb 26, 2008
Hitachi, Ltd.
Setsuo Arita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
D.C. vacuum circuit breaker for an electric motor vehicle
Patent number
5,214,557
Issue date
May 25, 1993
Hitachi, Ltd.
Mitsuyoshi Hasegawa
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Binary logic device having input and output alternating signals
Patent number
4,564,774
Issue date
Jan 14, 1986
Hitachi, Ltd.
Korefumi Tashiro
H03 - BASIC ELECTRONIC CIRCUITRY
Patents Applications
last 30 patents
Information
Patent Application
MULTI-HOP WIRELESS COMMUNICATION SYSTEM
Publication number
20090190542
Publication date
Jul 30, 2009
Oki Semiconductor Co., Ltd.
Hiroyuki AKIYAMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WIRELESS TERMINAL AND BASE STATION DEVICES FOR MULTI-HOP COMMUNICATION
Publication number
20090175255
Publication date
Jul 9, 2009
Oki Semiconductor Co., Ltd.
Hiroyuki AKIYAMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MULTICARRIER COMMUNICATION SYSTEM CAPABLE OF SWITCHING MODULATION S...
Publication number
20080288852
Publication date
Nov 20, 2008
Oki Electric Industry Co., Ltd.
Teruaki Uehara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
METHOD FOR ACQUIRING POSITIONAL INFORMATION ON A WIRELESS TERMINAL...
Publication number
20070086399
Publication date
Apr 19, 2007
Oki Electric Industry Co., Ltd.
Hiroyuki Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Handover method in wireless LAN by assigning an identification code...
Publication number
20060251021
Publication date
Nov 9, 2006
Oki Electric Industry Co., Ltd.
Yoshihisa Nakano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Method of controlling quality of service for a wireless LAN base st...
Publication number
20060120339
Publication date
Jun 8, 2006
Oki Electric Industry Co., Ltd.
Hiroyuki Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Radio apparatus joining an IBSS or ad hoc network
Publication number
20050286480
Publication date
Dec 29, 2005
Oki Electric Industry Co., Ltd.
Hiroyuki Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Wireless communication apparatus
Publication number
20050070270
Publication date
Mar 31, 2005
Oki Electric Industry Co., Ltd.
Hiroyuki Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Communication apparatus, communication method and installation meth...
Publication number
20040227036
Publication date
Nov 18, 2004
Hitachi, Ltd.
Setsuo Arita
H04 - ELECTRIC COMMUNICATION TECHNIQUE