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| Patents for Harry C. Marks | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,936,800 | May 17, 1960 | W.A. Eschenburg, A.G. Stauber, H.C. Marks | Twin ripsaw with oppositely driven blades and power feed | |
 | 3,074,210 | Jan. 22, 1963 | W.A. Eschenburg, H.C. Marks | Combination sander | |