US Patent 7841972 Dumbbell
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Patent abstract
A dumbbell includes a handle, a weight unit and two caps for retaining the weight unit within the handle. The weight unit includes weights and springs alternately arranged within the handle. Each of the caps is located against a related one of the springs so that the weights do not hit the handle axially.
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Patent Inventor Names
Hsuan Fu Huang0
Ming Nan Chen0
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US Patent 07841972 Dumbbell US Patent 7841972 Dumbbell
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Patent Number
07841972
Patent Number
7841972
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US Patent 07841972 Dumbbell
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Is a
Patent jurisdiction
Patent number
07841972
Date of patent
November 30, 2010
Patent application number
12587356
Date Filed
October 7, 2009
Patent primary examiner
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