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3559987
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Information
Patent Grant
3559987
References
Source
Patent Number
3,559,987
Date Filed
Not available
Date Issued
Tuesday, February 2, 1971
53 years ago
CPC
A63B21/0609 - consisting of loosely interconnected elements for progressively changing weight
A63B21/06 - User-manipulated weights
A63B21/154 - using special pulley-assemblies
A63B2225/107 - Resisting devices being of the same kind
A63B2225/30 - Maintenance
US Classifications
482 - Exercise devices
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