Robert Keith Sorensen

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Dallas, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Hardening of selected areas of an earth boring rockbit
- Patent number 4,660,444
- Issue date Apr 28, 1987
- Dresser Industries, Inc.
- Robert K. Sorensen
- C21 - METALLURGY OF IRON
Information Patent Grant
Journal and pilot bearings with alternating surface areas of wear r...
- Patent number 4,105,263
- Issue date Aug 8, 1978
- Dresser Industries, Inc.
- Robert K. Sorensen
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Journal and pilot bearings with alternating surface areas of wear r...
- Patent number 3,984,158
- Issue date Oct 5, 1976
- Dresser Industries, Inc.
- Robert Keith Sorensen
- B22 - CASTING POWDER METALLURGY