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Wasao Takasugi
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Higashiyamato, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Information carrier and process for production thereof
Patent number
6,926,794
Issue date
Aug 9, 2005
Hitachi Maxell, Ltd.
Kyouichi Kohama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Non-contact information medium and communication system utilizing t...
Patent number
6,837,438
Issue date
Jan 4, 2005
Hitachi Maxell, Ltd.
Wasao Takasugi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Reader and system for noncontact type information storage medium
Patent number
6,786,407
Issue date
Sep 7, 2004
Hitachi Maxell, Ltd.
Wasao Takasugi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Information carrier and process for production thereof
Patent number
6,482,495
Issue date
Nov 19, 2002
Hitachi Maxwell, Ltd.
Kyouichi Kohama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Noncontact communication semiconductor device
Patent number
6,344,824
Issue date
Feb 5, 2002
Hitachi Maxell, Ltd.
Wasao Takasugi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Information carrier and process for producing same
Patent number
5,856,662
Issue date
Jan 5, 1999
Hitachi Maxell, Ltd.
Kyoichi Kohama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and apparatus for information recording and reproduction of...
Patent number
RE35435
Issue date
Jan 28, 1997
Hitachi, Ltd.
Atsushi Saito
369 - Dynamic information storage or retrieval
Information
Patent Grant
Non-contact system parallel data transfer system
Patent number
5,574,273
Issue date
Nov 12, 1996
Hitachi Maxell, Ltd.
Kazunari Nakagawa
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Non-contact, electromagnetically coupled transmission and receiving...
Patent number
5,418,353
Issue date
May 23, 1995
Hitachi Maxell, Ltd.
Yosuke Katayama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Ultrasonic diagnostic system
Patent number
5,295,485
Issue date
Mar 22, 1994
Hitachi, Ltd.
Ryuuichi Shinomura
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Method and associated apparatus and medium for optical recording an...
Patent number
4,949,325
Issue date
Aug 14, 1990
Hitachi, Ltd.
Toshiaki Tsuyoshi
G11 - INFORMATION STORAGE
Information
Patent Grant
Light spot position control system and method by sampled servo
Patent number
4,872,152
Issue date
Oct 3, 1989
Hitachi, Ltd.
Toshiaki Tsuyoshi
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for information recording and reproduction of...
Patent number
4,866,692
Issue date
Sep 12, 1989
Hitachi, Ltd.
Atsushi Saito
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording and reproducing apparatus with tracki...
Patent number
4,847,822
Issue date
Jul 11, 1989
Hitachi, Ltd.
Wasao Takasugi
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for compensating variation of read data in an...
Patent number
4,835,759
Issue date
May 30, 1989
Hitachi, Ltd.
Atsushi Saito
G11 - INFORMATION STORAGE
Information
Patent Grant
Transmitter/receiver for ultrasonic diagnostic system
Patent number
4,817,066
Issue date
Mar 28, 1989
Hitachi, Ltd.
Wasao Takasugi
G01 - MEASURING TESTING
Information
Patent Grant
Light spot position control system and method by sampling servo
Patent number
4,785,442
Issue date
Nov 15, 1988
Hitachi, Ltd.
Masatoshi Ohtake
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording medium and method for reproducing the same
Patent number
4,748,611
Issue date
May 31, 1988
Hitachi, Ltd.
Toshiaki Tsuyoshi
G11 - INFORMATION STORAGE
Information
Patent Grant
Ultrasonic measurement apparatus
Patent number
4,735,211
Issue date
Apr 5, 1988
Hitachi, Ltd.
Wasao Takasugi
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Input circuit in ultrasonic apparatus
Patent number
4,680,498
Issue date
Jul 14, 1987
Hitachi, Ltd.
Wasao Takasugi
G01 - MEASURING TESTING
Information
Patent Grant
Optical recording method
Patent number
4,646,103
Issue date
Feb 24, 1987
Hitachi, Ltd.
Hisataka Sugiyama
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording and reproducing apparatus with tracking contr...
Patent number
4,564,929
Issue date
Jan 14, 1986
Hitachi, Ltd.
Seiji Yonezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Control circuit for controlling light source in optical disc device
Patent number
4,507,767
Issue date
Mar 26, 1985
Hitachi, Ltd.
Wasao Takasugi
G11 - INFORMATION STORAGE
Information
Patent Grant
Focal position detecting optical apparatus
Patent number
4,450,547
Issue date
May 22, 1984
Hitachi, Ltd.
Shigeru Nakamura
G02 - OPTICS
Information
Patent Grant
Method and device for recording and reproducing tracking information
Patent number
4,392,219
Issue date
Jul 5, 1983
Hitachi, Ltd.
Norio Yokozawa
G11 - INFORMATION STORAGE
Information
Patent Grant
PCM Recording and reproducing apparatus
Patent number
4,282,551
Issue date
Aug 4, 1981
Hitachi, Ltd.
Yasunori Kanazawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Differential current amplifier
Patent number
4,258,330
Issue date
Mar 24, 1981
Hitachi, Ltd.
Kenji Kaneko
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Comparator circuit having multi-functions
Patent number
4,177,394
Issue date
Dec 4, 1979
Hitachi, Ltd.
Wasao Takasugi
H03 - BASIC ELECTRONIC CIRCUITRY
Patents Applications
last 30 patents
Information
Patent Application
Information carrier and process for production thereof
Publication number
20030037875
Publication date
Feb 27, 2003
HITACHI MAXELL, LTD.
Kyouichi Kohama
G06 - COMPUTING CALCULATING COUNTING