Ralph A. Landrum Jr.

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Simultaneous performance of multiple seismic vibratory surveys
- Patent number 4,715,020
- Issue date Dec 22, 1987
- Western Atlas International, Inc.
- Ralph A. Landrum
- G01 - MEASURING TESTING
Information Patent Grant
Adaptive preset force level control for a seismic vibrator
- Patent number 4,567,583
- Issue date Jan 28, 1986
- Western Geophysical Company of America
- Ralph A. Landrum
- G01 - MEASURING TESTING
Information Patent Grant
Protective drive-level limiter for an electro-hydraulic vibrator
- Patent number 4,516,230
- Issue date May 7, 1985
- Western Geophysical Company of America
- Kent J. Goodloe
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
Information Patent Grant
Noise-suppression method
- Patent number 4,344,158
- Issue date Aug 10, 1982
- Western Geophysical Co. of America
- Ralph A. Landrum
- G01 - MEASURING TESTING