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| Patents for P. A. Costich | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 343,155 | Jun. 01, 1886 | S. Fawcett, H.F. Smith | Die For Making Blanks For Pipe Tongs | |
 | 349,847 | Sep. 28, 1886 | J. Judson | Governor | |
 | 374,773 | Dec. 13, 1887 | W. Bradford | Hollow Auger | |