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Aerifier core mulcher
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Patent number 5,983,560
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Issue date Nov 16, 1999
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Ruben Hartmeister
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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Keyhole rod bender
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Patent number 5,389,099
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Issue date Feb 14, 1995
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Ruben Hartmeister
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Surgical compression forceps
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Patent number 5,284,487
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Issue date Feb 8, 1994
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Ruben J. Hartmeister
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Power driven hand tool assembly
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Patent number 4,998,351
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Issue date Mar 12, 1991
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Ruben J. Hartmeister
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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