| All Patents in class 408/47 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 3,151X | Dec. 21, 1819 | J. Corbett | Machine for boring holes in posts | wood drilling and boring |
| 121,074 | Nov. 21, 1871 | F.S. Allen, C.F. Ritchel | Improvement in boring-machines | drilling and boring |
| RE5,222 | Jan. 07, 1873 | N.R. Merchant | Improvement in boring-machines | cooper |
| 147,339 | Feb. 10, 1874 | G.W. McCready | Improvement in boring-machines | drilling and boring |
| 421,517 | Feb. 18, 1890 | F.H. Richards | Drilling Machine | drill presses |
| 552,379 | Dec. 31, 1895 | A.J. Langelier | Multiple drill | multiple spindle drill presses |
| 2,522,736 | Sep. 19, 1950 | F.G. Zagar | Parallel motion multiple spindle head | multiple spindle drilling heads |
