William S. Strange Jr.

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Waskom, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Drill bit with forward sweep cutting elements
- Patent number 5,443,565
- Issue date Aug 22, 1995
- William S. Strange
- E21 - EARTH DRILLING MINING
Information Patent Grant
Core drill bit
- Patent number 5,379,852
- Issue date Jan 10, 1995
- William S. Strange
- E21 - EARTH DRILLING MINING