Takazumi Ishizu

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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
Process for producing high purity nitrogen
- Patent number 4,746,332
- Issue date May 24, 1988
- Hitachi, Ltd.
- Masaomi Tomomura
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Method and apparatus for separating gases
- Patent number 4,704,139
- Issue date Nov 3, 1987
- Hitachi, Ltd.
- Akio Yamamoto
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL