Dean D. Campbell

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Seattle, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Ultrasonic transducer with tensioned diaphragm and method
- Patent number 4,980,873
- Issue date Dec 25, 1990
- William C. Gross
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Automatic calibration method for thickness gauges
- Patent number 4,955,225
- Issue date Sep 11, 1990
- Ultrasonic Arrays, Inc.
- James N. Kniest
- G01 - MEASURING TESTING
Information Patent Grant
Automatic calibration method for thickness gauges
- Patent number 4,823,590
- Issue date Apr 25, 1989
- Ultrasonic Arrays, Inc.
- James N. Kniest
- G01 - MEASURING TESTING