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Helical coil spring damper assembly
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Patent number 6,789,790
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Issue date Sep 14, 2004
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Frank H. Speckhart
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Torsional vibration absorber system
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Patent number 5,295,411
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Issue date Mar 22, 1994
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Frank H. Speckhart
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Impact force shaping head
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Patent number 4,688,646
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Issue date Aug 25, 1987
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University of Tennessee Research Corporation
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Frank H. Speckhart
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Pneumatic valve return
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Patent number 4,592,313
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Issue date Jun 3, 1986
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Frank H. Speckhart
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Aluminum valve spring retainer
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Patent number 4,201,162
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Issue date May 6, 1980
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Frank H. Speckhart
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Limited rotation roller tappet
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Patent number 4,173,954
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Issue date Nov 13, 1979
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Frank H. Speckhart
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES