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Centrifugal clutch with centrifugal detent
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Patent number 4,020,936
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Issue date May 3, 1977
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Aspro, Incorporated
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Richard C. St. John
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Centrifugal clutch construction
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Patent number 4,016,963
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Issue date Apr 12, 1977
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Aspro, Incorporated
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Richard C. St. John
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Noise-dampened pulley construction
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Patent number 3,994,181
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Issue date Nov 30, 1976
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Aspro, Incorporated
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Nolte V. Sproul
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Traction control apparatus
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Patent number 3,981,545
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Issue date Sep 21, 1976
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Aspro, Incorporated
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William C. Eddy
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B60 - VEHICLES IN GENERAL
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