Merrill K. Haddon

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Tigard, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for acoustic detection of faults in undergroun...
- Patent number 4,835,478
- Issue date May 30, 1989
- Merrill K. Haddon
- G01 - MEASURING TESTING
Information Patent Grant
Method of nondestructively establishing an earth gradient for cable...
- Patent number 4,697,137
- Issue date Sep 29, 1987
- Acqua-Tronics, Inc.
- Merrill Haddon
- G01 - MEASURING TESTING
Information Patent Grant
Automatic impedance matching conduit locator
- Patent number 4,233,561
- Issue date Nov 11, 1980
- Merrill K. Haddon
- G01 - MEASURING TESTING