File:Automatic snow chain system.gif
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Summary
[edit]United States Patent No. 6830134 of August 17, 1915. (Automatic snow chain system)
Patent granted to the American inventor W.H. Putnam.
Source: http://www.onspot.com/indhisfr.htm
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:55, 14 October 2007 | | 288 × 472 (44 KB) | Odengatan (talk | contribs) | United States Patent No. 6830134 (Automatic snow chain system) |
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