Takeo Maeda

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for detecting shortcircuit in arm of GTO inverter
- Patent number 4,384,248
- Issue date May 17, 1983
- Hitachi, Ltd.
- Yasuo Matsuda
- G01 - MEASURING TESTING
Information Patent Grant
Slotless brushless motor
- Patent number 4,336,475
- Issue date Jun 22, 1982
- Hitachi, Ltd.
- Shigeki Morinaga
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Controlling apparatus for electric sewing machine
- Patent number 4,173,193
- Issue date Nov 6, 1979
- Hitachi, Ltd.
- Shigeki Morinaga
- D05 - SEWING EMBROIDERING TUFTING
Information Patent Grant
Current source inverter
- Patent number 4,156,899
- Issue date May 29, 1979
- Hitachi, Ltd.
- Yasuo Matsuda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Variable speed control apparatus for induction motor
- Patent number 4,099,108
- Issue date Jul 4, 1978
- Hitachi, Ltd.
- Tadashi Okawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER