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| Patents for Robert Adt | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 778,922 | Jan. 03, 1905 | J.A. Traut | Cutter Fastening for Spokeshaves | |
 | 820,998 | May 22, 1906 | A. Swasey | Telescopic Sight for Firearms | |