Frederick W. Ng

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Anchorage, AK, US

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Patents Grantslast 30 patents

Information Patent Grant
Coal seam discontinuity sensor and method for coal mining apparatus
- Patent number 4,968,098
- Issue date Nov 6, 1990
- Atlantic Richfield Company
- Robert L. Hirsch
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and system for vertical seismic profiling by measuring drill...
- Patent number 4,965,774
- Issue date Oct 23, 1990
- Atlantic Richfield Company
- Fred W. Ng
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method for completing a well in a permafrost zone
- Patent number 3,995,695
- Issue date Dec 7, 1976
- Atlantic Richfield Company
- Thomas K. Perkins
- E21 - EARTH DRILLING MINING