Richard F. Griffith

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Minneapolis, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Optical film having microreplicated structures and methods
- Patent number 8,579,492
- Issue date Nov 12, 2013
- 3M Innovative Properties Company
- Kenneth A. Epstein
- G02 - OPTICS
Information Patent Grant
Illumination assembly and system
- Patent number 7,695,180
- Issue date Apr 13, 2010
- 3M Innovative Properties Company
- Craig R. Schardt
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Light directing construction having corrosion resistant feature
- Patent number 6,626,545
- Issue date Sep 30, 2003
- 3M Innovative Properties Company
- Timothy J. Gardner
- G02 - OPTICS
Information Patent Grant
Light directing construction having corrosion resistant feature
- Patent number 6,590,711
- Issue date Jul 8, 2003
- 3M Innovative Properties Co.
- Timothy J. Gardner
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL FILM HAVING MICROREPLICATED STRUCTURES AND METHODS
- Publication number 20080049341
- Publication date Feb 28, 2008
- 3M Innovative Propperties Company
- Kenneth A. Epstein
- G02 - OPTICS
Information Patent Application
ILLUMINATION ASSEMBLY AND SYSTEM
- Publication number 20070047254
- Publication date Mar 1, 2007
- 3M Innovative Properties Company
- Craig R. Schardt
- G02 - OPTICS
Information Patent Application
Optical film having microeplicated structures; and methods
- Publication number 20050024754
- Publication date Feb 3, 2005
- 3M Innovative Properties Company
- Kenneth A. Epstein
- G02 - OPTICS
Information Patent Application
Light directing construction having corrosion resistant feature
- Publication number 20030095332
- Publication date May 22, 2003
- 3M Innovative Properties Company
- Timothy J. Gardner
- G02 - OPTICS
Information Patent Application
Optical film having microreplicated structures; and methods
- Publication number 20030058553
- Publication date Mar 27, 2003
- Kenneth A. Epstein
- G02 - OPTICS
Information Patent Application
Optical film having microreplicated structures; and methods
- Publication number 20030035231
- Publication date Feb 20, 2003
- Kenneth A. Epstein
- G02 - OPTICS