Ryuji Kojima

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Humidity sensor
- Patent number 5,028,906
- Issue date Jul 2, 1991
- Nihon Parkerizing Co., Ltd.
- Yoshio Moriya
- G01 - MEASURING TESTING
Information Patent Grant
Test method for phosphate coatings
- Patent number 4,533,639
- Issue date Aug 6, 1985
- Parker Chemical Company
- Ryuji Kojima
- G01 - MEASURING TESTING