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cochran wrench

Started by amertrac, June 16, 2013, 04:35:54 AM

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amertrac

June 16, 2013, 04:35:54 AM
Cochran speednut wrench  patent date may 2 1913  Chicago ill
TO SOON ULD UND TO LATE SCHMART

mvwcnews

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June 16, 2013, 11:25:47 PM
1916 ( http://www.datamp.org/patents/advance.php?pn=D48996&id=30746&set=5 ). 
The patent & manufacturing history of these "speednut" self adjusting wrenches is very convoluted. 
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