David Zhang

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Edwardsville, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Intermediate member for extending the depth of a window or door and...
- Patent number 9,382,748
- Issue date Jul 5, 2016
- Francis Manzella
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS

Patents Applicationslast 30 patents

Information Patent Application
INTERMEDIATE MEMBER FOR EXTENDING THE DEPTH OF A WINDOW OR DOOR AND...
- Publication number 20140311041
- Publication date Oct 23, 2014
- Francis Manzella
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS