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Patents for Louis S. Hayden | |||||
Number | Date | Patentee | Title | Type | |
500,498 | Jun. 27, 1893 | L.S. Hayden | Expansive Bit | adjustable drill bits | |
1,056,670 | Mar. 18, 1913 | L.S. Hayden | Expansion Bit | drill bits | |
1,398,779 | Nov. 29, 1921 | L.S. Hayden | Tool for boring and counterboring wood | drill bits |