Duwayne C. Radke

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Woodbury, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Coupling system for a light conduit
- Patent number 6,398,421
- Issue date Jun 4, 2002
- 3M Innovative Properties Company
- Joseph A. Hoffman
- G02 - OPTICS
Information Patent Grant
Thermally protective coupling for a light conduit lighting system
- Patent number 6,325,550
- Issue date Dec 4, 2001
- 3M Innovative Properties Company
- Joseph A. Hoffman
- G02 - OPTICS
Information Patent Grant
Mounting assembly for a light conduit lighting system
- Patent number 6,152,578
- Issue date Nov 28, 2000
- 3M Innovative Properties Company
- Joseph A. Hoffman
- G02 - OPTICS
Information Patent Grant
Coupling system for a light conduit
- Patent number 6,130,976
- Issue date Oct 10, 2000
- 3M Innovative Properties Company
- Joseph A. Hoffman
- G02 - OPTICS