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Yoshio Ichikawa
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Tokyo, JP
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last 30 patents
Information
Patent Grant
Radio paging system having a plurality of transmitter stations
Patent number
5,561,701
Issue date
Oct 1, 1996
NEC Corporation
Yoshio Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission and reception of pager signals without useless samplin...
Patent number
5,430,437
Issue date
Jul 4, 1995
NEC Corporation
Yoshio Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Paging system and its operating method with repeated transmission
Patent number
5,291,192
Issue date
Mar 1, 1994
NEC Corporation
Yoshio Ichikawa
G08 - SIGNALLING
Information
Patent Grant
Apparatus for allocating subscriber identification numbers to plura...
Patent number
5,111,197
Issue date
May 5, 1992
NEC Corporation
Yoshio Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio communication system having means for avoiding signal collision
Patent number
5,042,083
Issue date
Aug 20, 1991
NEC Corporation
Yoshio Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio paging system capable of transmitting common information and...
Patent number
4,783,654
Issue date
Nov 8, 1988
NEC Corporation
Yoshio Ichikawa
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Pager receiver for giving at least one of extraordinary tones and e...
Patent number
4,758,834
Issue date
Jul 19, 1988
Nippon Electric Co., Ltd.
Yukio Sato
G08 - SIGNALLING
Information
Patent Grant
Paging receiver having a plurality of test modes
Patent number
4,720,710
Issue date
Jan 19, 1988
NEC Corporation
Masaaki Akahori
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Pager receiver for giving at least one of extraordinary tones and e...
Patent number
4,704,608
Issue date
Nov 3, 1987
Nippon Electric Co., Ltd.
Yukio Sato
G08 - SIGNALLING
Information
Patent Grant
Display pager having memory overflow indication and concurrent mess...
Patent number
4,682,148
Issue date
Jul 21, 1987
NEC Corporation
Yoshio Ichikawa
G08 - SIGNALLING
Information
Patent Grant
Digital paging system having bit rate switching means and digital p...
Patent number
4,642,632
Issue date
Feb 10, 1987
NEC Corporation
Takashi Ohyagi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Radio communication apparatus disabled on reception of a predetermi...
Patent number
4,639,726
Issue date
Jan 27, 1987
NEC Corporation
Yoshio Ichikawa
G08 - SIGNALLING
Information
Patent Grant
Display radio paging receiver for variable length messages
Patent number
4,626,842
Issue date
Dec 2, 1986
NEC Corporation
Yoshio Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio paging receiver having display control means
Patent number
4,536,761
Issue date
Aug 20, 1985
Nippon Electric Co., Ltd.
Kazuyuki Tsunoda
G08 - SIGNALLING
Information
Patent Grant
Battery saver for a paging receiver or the like _
Patent number
4,506,386
Issue date
Mar 19, 1985
NEC Corporation
Yoshio Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Pulse detecting circuit of receiver for use in digital radio commun...
Patent number
4,481,675
Issue date
Nov 6, 1984
Nippon Electric Co., Ltd.
Yoshio Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio paging receiver having stored message protection means
Patent number
4,477,808
Issue date
Oct 16, 1984
Nippon Electric Co., Ltd.
Yoshio Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE