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Patents for Edwin Bookmyer | |||||
Number | Date | Patentee | Title | Type | |
473,582 | Apr. 26, 1892 | H.B. Keiper | Screw-cutting plate | ||
530,846 | Dec. 11, 1894 | H.B. Keiper | Screw-cutting plate | ||
595,312 | Dec. 14, 1897 | H.B. Keiper | Tap Wrench | tap wrenches and die stocks |