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| Patents for Peter Gerlach Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 113,214 | Mar. 28, 1871 | W. Marriott, J. Sherman | Improvement in stave-jointers | |
 | 730,920 | Jun. 16, 1903 | P.J. Joecken | Feeding apparatus for wood strips | |
 | 791,301 | May 30, 1905 | F. Stahl | Saw-gumming machine | |