Robert F. Ballard Jr.

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Clinton, MS, US

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Patents Grantslast 30 patents

Information Patent Grant
Reversible polarity borehole seismic device for P and enhanced S-wa...
- Patent number 5,992,559
- Issue date Nov 30, 1999
- Robert F. Ballard
- G01 - MEASURING TESTING
Information Patent Grant
High-frequency borehole seismic source
- Patent number 5,305,287
- Issue date Apr 19, 1994
- The United States of America as represented by the Secretary of the Army
- Robert F. Ballard
- G01 - MEASURING TESTING