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Motorized auger
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Patent number 6,056,065
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Issue date May 2, 2000
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Power Technology Unlimited, Inc.
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Jeffery D. Campbell
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E21 - EARTH DRILLING MINING
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Motorized wheelbarrow
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Patent number 5,878,827
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Issue date Mar 9, 1999
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Power Technology Unlimited, Inc.
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Rick Dean Fox
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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Wheeled motorized mixer
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Patent number 5,868,494
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Issue date Feb 9, 1999
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Power Technology Unlimited, In.
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Jeffery D. Campbell
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B28 - WORKING CEMENT, CLAY, OR STONE