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Tsuchiura, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Water quality meter and water quality monitoring system
Patent number
6,444,172
Issue date
Sep 3, 2002
Hitachi, Ltd.
Masao Fukunaga
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Water quality meter and water quality monitoring system
Patent number
6,398,930
Issue date
Jun 4, 2002
Hitachi, Ltd.
Masao Fukunaga
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Water quality meter and water monitoring system
Patent number
6,290,908
Issue date
Sep 18, 2001
Hitachi, Ltd.
Masao Fukunaga
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Water quality management system
Patent number
6,245,224
Issue date
Jun 12, 2001
Hitachi, Ltd.
Hideo Enoki
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Optical pressure detection method and apparatus
Patent number
5,929,989
Issue date
Jul 27, 1999
Hitachi, Ltd.
Sadao Mori
G01 - MEASURING TESTING
Information
Patent Grant
Physical quantity measurement apparatus and instrument therefor
Patent number
5,675,415
Issue date
Oct 7, 1997
Hitachi, Ltd.
Toshio Akatsu
G01 - MEASURING TESTING
Information
Patent Grant
Automatic focusing apparatus and method includes a photorefractive...
Patent number
5,148,010
Issue date
Sep 15, 1992
Hitachi, Ltd.
Sadao Mori
G02 - OPTICS
Information
Patent Grant
Laser gauge interferometer and locating method using the same
Patent number
4,984,891
Issue date
Jan 15, 1991
Hitachi, Ltd.
Chuuichi Miyazaki
G01 - MEASURING TESTING
Information
Patent Grant
Method and apparatus for diagnosing abnormal state of sodium (NA)--...
Patent number
4,881,026
Issue date
Nov 14, 1989
Hitachi, Ltd.
Yasumasa Ishida
G01 - MEASURING TESTING
Information
Patent Grant
Method of and apparatus for optically measuring displacement
Patent number
4,728,194
Issue date
Mar 1, 1988
Hitachi, Ltd.
Sadao Mori
G01 - MEASURING TESTING
Information
Patent Grant
Method of and apparatus for optically measuring displacement
Patent number
4,708,481
Issue date
Nov 24, 1987
Hitachi, Ltd.
Sadao Mori
G01 - MEASURING TESTING
Patents Applications
last 30 patents
Information
Patent Application
Water quality meter and water quality monitoring system
Publication number
20010013488
Publication date
Aug 16, 2001
Masao Fukunaga
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Application
Water quality meter and water quality monitoring system
Publication number
20010011642
Publication date
Aug 9, 2001
Masao Fukunaga
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE