On Hing CHENG

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Patents Grantslast 30 patents

Information Patent Grant
Leaf blower
- Patent number 8,911,221
- Issue date Dec 16, 2014
- Johnson Electric S.A.
- On Hing Cheng
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
Leaf Blower
- Publication number 20110223048
- Publication date Sep 15, 2011
- On Hing CHENG
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...