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Bruce A. Waddell
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Seattle, WA, US
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last 30 patents
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Patent Grant
Mobile mining machine and method
Patent number
4,548,442
Issue date
Oct 22, 1985
The Robbins Company
David B. Sugden
E21 - EARTH DRILLING MINING
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Patent Grant
Roller cutter mounts
Patent number
4,202,418
Issue date
May 13, 1980
The Robbins Company
Bruce A. Waddell
E21 - EARTH DRILLING MINING