David L. Peterman

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Redwood Valley, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Continuous-depth-indicating underground pipe and cable locator
- Patent number 6,140,819
- Issue date Oct 31, 2000
- Heath Consultants, Inc.
- Earl J. Peterman
- G01 - MEASURING TESTING
Information Patent Grant
Method for locating the joints and fracture points of underground j...
- Patent number 5,686,828
- Issue date Nov 11, 1997
- New York State Electric & Gas Corporation
- Earl J. Peterman
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus for locating concealed electrical conductors
- Patent number 5,001,430
- Issue date Mar 19, 1991
- Heath Consultants, Inc.
- Earl J. Peterman
- G01 - MEASURING TESTING