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| Patents for F. G. Hartman | |||||
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| Number | Date | Patentee | Title | Type | |
| 747,224 | Dec. 15, 1903 | A. Rieffel | Micrometer Gage | micrometers | |
| 1,299,764 | Apr. 08, 1919 | D.J. Normoyle | Wrench | tap wrenches and die stocks | |