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| Patents for Harry M. Butler | |||||
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| Number | Date | Patentee | Title | Type | |
| 783,721 | Feb. 28, 1905 | E.C. Clapp | Micrometer Gage | micrometers | |
| 1,079,420 | Nov. 25, 1913 | S. MacKay | Method of Adjusting Rotary Cutters | sharpening machines | |