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| All Patents in class 408/32 | |||||
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| Number | Date | Patentee | Title | Type | |
| 497,434 | May 16, 1893 | W.S. Sherman | Boring or drilling machine | wood drilling and boring | |
| 515,506 | Feb. 27, 1894 | W.S. Sherman | Boring or drilling machine | wood drilling and boring | |
| 596,772 | Jan. 04, 1898 | W.W. Green | Multiple Boring Machine | ||
| 708,177 | Sep. 02, 1902 | W.S. Sherman | Boring-machine | wood drilling and boring | |
| 797,170 | Aug. 15, 1905 | L. Brodt | Door stile and rail boring machine | wood drilling and boring | |