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3521312
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Information
Patent Grant
3521312
References
Source
Patent Number
3,521,312
Date Filed
Not available
Date Issued
Tuesday, July 21, 1970
54 years ago
CPC
A63B31/11 - attachable only to the feet
A63B2031/112 - with means facilitating walking
A63B2031/117 - with blade lying substantially in the body-symmetrical plane
US Classifications
441 - Buoys, rafts, and aquatic devices
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