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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Apparatus for measuring impurities in super-pure water without expo...
Patent number
4,680,552
Issue date
Jul 14, 1987
Erma Optical Works, Ltd.
Kozo Shirato
G01 - MEASURING TESTING
Information
Patent Grant
Apparatus for measuring impurities in ultrapure water
Patent number
4,651,087
Issue date
Mar 17, 1987
Erma Optical Works, Ltd.
Kozo Shirato
G01 - MEASURING TESTING
Information
Patent Grant
Liquid chromatograph with flow controller
Patent number
4,629,561
Issue date
Dec 16, 1986
Erma Optical Works, Ltd.
Kozo Shirato
G01 - MEASURING TESTING
Information
Patent Grant
Method and device for degassifying liquid
Patent number
4,469,495
Issue date
Sep 4, 1984
Erma Optical Works, Ltd.
Kazuo Hiraizumi
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
High-sensitivity differential refractometer
Patent number
4,126,393
Issue date
Nov 21, 1978
Showa Denko K.K.
Sadao Sumikama
G01 - MEASURING TESTING