Sigma Research, Inc.

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Richland, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Direct expansion solar collector-heat pump system
- Patent number 4,798,056
- Issue date Jan 17, 1989
- Sigma Research, Inc.
- James L. Franklin
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Flaw imaging in ferrous and nonferrous materials using magneto-opti...
- Patent number 4,625,167
- Issue date Nov 25, 1986
- Sigma Research, Inc.
- Gerald L. Fitzpatrick
- G01 - MEASURING TESTING
Information Patent Grant
Ultrasonic method and apparatus for determining the depth of a crac...
- Patent number 4,522,064
- Issue date Jun 11, 1985
- Sigma Research Inc.
- John D. McMillan
- G01 - MEASURING TESTING
Information Patent Grant
Direct expansion solar collector-heat pump system
- Patent number 4,392,359
- Issue date Jul 12, 1983
- Sigma Research, Inc.
- James L. Franklin
- F24 - HEATING RANGES VENTILATING

Patents Applicationslast 30 patents

Trademarklast 30 trademarks

Information Trademark
73793439 - DOUG GRANT
- Serial number 73793439
- Registration number 1606792
- Filing date Apr 17, 1989
- SIGMA RESEARCH, INC.
- 41 - Education