Shozi Koyama

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Yamaguchi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of and apparatus for producing superpure nitrogen
- Patent number 5,122,175
- Issue date Jun 16, 1992
- Hitachi, Ltd.
- Shozi Koyama
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Method and apparatus for gas separation
- Patent number 4,746,343
- Issue date May 24, 1988
- Hitachi, Ltd.
- Takazumi Ishizu
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Method and apparatus for separating of product gas from raw gas
- Patent number 4,696,689
- Issue date Sep 29, 1987
- Hitachi, Ltd.
- Hideharu Mori
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Process for recovering nitrogen in low pressure type air separation...
- Patent number 4,299,607
- Issue date Nov 10, 1981
- Hitachi, Ltd.
- Michimasa Okabe
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...