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| Patents for Gilkerson Machine Works | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 251,322 | Dec. 20, 1881 | J.A. Gilkerson, J. Vandenburgh | Screw-cutting machine | |
 | 323,414 | Aug. 04, 1885 | J.A. Giles | Work-holding chuck | |