Roger C. Parsons

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St. John's, CA

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for drilling a hole in a body of ice and for t...
- Patent number 4,256,188
- Issue date Mar 17, 1981
- Resource Development Consultants Ltd.
- Robert M. Hopkins
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method for controlling stress and increasing the strength of suppor...
- Patent number 3,948,055
- Issue date Apr 6, 1976
- Continental Oil Company
- Dai S. Choi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING