Matthew S. Douglas

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San Francisco, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Window covering with independently movable support rods
- Patent number 9,004,144
- Issue date Apr 14, 2015
- Matthew S. Douglas
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS

Patents Applicationslast 30 patents

Information Patent Application
WINDOW COVERING
- Publication number 20110067827
- Publication date Mar 24, 2011
- Matthew S. Douglas
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS