Ronald Chung Yin MAK

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Hong Kong, CN

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Patents Grantslast 30 patents

Information Patent Grant
Electric sharpener for writing instruments
- Patent number 7,455,087
- Issue date Nov 25, 2008
- King Biu Mak
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
PAPER SHREDDING TOOL
- Publication number 20090014566
- Publication date Jan 15, 2009
- King Biu MAK
- B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
Information Patent Application
Electric Sharpener For Writing Instruments
- Publication number 20080163955
- Publication date Jul 10, 2008
- King Biu MAK
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES