Duane A. Haven

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Cupertino, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for and method of operation of smectic liquid crystal lig...
- Patent number 5,140,448
- Issue date Aug 18, 1992
- Greyhawk Systems, Inc.
- Matthew Bone
- G02 - OPTICS
Information Patent Grant
Variable density optical filter
- Patent number 5,040,879
- Issue date Aug 20, 1991
- Greyhawk Systems, Inc.
- Duane A. Haven
- G02 - OPTICS