Akira Maekawa

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Hitachi-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Mass spectrometry and mass spetrometer using the same
- Patent number 6,765,200
- Issue date Jul 20, 2004
- Hitachi, Ltd.
- Akira Maekawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Phase synchronization system for connecting a power converter to a...
- Patent number 6,304,468
- Issue date Oct 16, 2001
- Hitachi, Ltd.
- Masaya Ichinose
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Electric power variation compensating device
- Publication number 20030015876
- Publication date Jan 23, 2003
- Masaya Ichinose
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
Mass spectrometry and mass spetrometer using the same
- Publication number 20010019107
- Publication date Sep 6, 2001
- Hitachi, Ltd.
- Akira Maekawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Power converter system and method of controlling power converter
- Publication number 20010005321
- Publication date Jun 28, 2001
- Masaya Ichinose
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC