Fred G. Hewitt

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Eagan, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Methods for assessing visual tasks to establish desirable lighting...
- Patent number 6,417,919
- Issue date Jul 9, 2002
- Orfield Laboratories, Incorporated
- Frederick G. Hewitt
- G01 - MEASURING TESTING
Information Patent Grant
Methods for assessing visual tasks to establish desirable lighting...
- Patent number 6,147,752
- Issue date Nov 14, 2000
- Orfield Laboratories, Incorporated
- Frederick G. Hewitt
- G01 - MEASURING TESTING
Information Patent Grant
Industrial viewing station for inspection of defects
- Patent number 5,841,530
- Issue date Nov 24, 1998
- Frederick G. Hewitt
- G01 - MEASURING TESTING
Information Patent Grant
Methods for assessing visual tasks to establish desirable lighting...
- Patent number 5,686,987
- Issue date Nov 11, 1997
- Orfield Associates, Inc.
- Frederick G. Hewitt
- G01 - MEASURING TESTING
Information Patent Grant
Wide angle optical transmitter/receiver
- Patent number 4,559,445
- Issue date Dec 17, 1985
- The United States of America as represented by the Secretary of the Air Force
- Raymond C. Hedin
- G01 - MEASURING TESTING
Information Patent Grant
Magneto-optic light deflector system
- Patent number 4,270,862
- Issue date Jun 2, 1981
- Sperry Corporation
- Frederick G. Hewitt
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Methods for assessing visual tasks to establish desirable lighting...
- Publication number 20030058434
- Publication date Mar 27, 2003
- Orfield Laboratories
- Frederick G. Hewitt
- G01 - MEASURING TESTING