Fretrick Siu Kwan Ko

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Hong Kong, CN

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Patents Grantslast 30 patents

Information Patent Grant
Single direction single phase synchronous motor
- Patent number 6,046,522
- Issue date Apr 4, 2000
- Johnson Electric S.A.
- Fretrick Siu Kwan Ko
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Coupling device for a pump impeller
- Patent number 6,007,308
- Issue date Dec 28, 1999
- Johnson Electric S.A.
- Fretrick Siu Kwan Ko
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...