| All Patents in class 408/137 |
Patents 31 -
45
of 56
      |
| Number | Date | Patentee | Title | Type |
| 441,509 | Nov. 25, 1890 | F. Schoff | Drill-support | portable metal drilling machines |
| 460,692 | Oct. 06, 1891 | F.H. Richards | Drilling-machine | drill presses |
| 506,954 | Oct. 17, 1893 | J.G. Timolat, C. Jacobson | Portable drill | portable metal boring and drilling machines |
| 570,050 | Oct. 27, 1896 | W.S. Phelps | Compound Feed Motion for Boring Cylinders | metal lathe accessories and attachments |
| 579,037 | Mar. 16, 1897 | C.O. Bulock, A.E. McLauchlin | Centering Machine | horizontal drilling machines |
| 592,007 | Oct. 19, 1897 | S.G. Howe | Shut Off and Pipe Drilling Device | portable metal drilling machines |
| 592,193 | Oct. 19, 1897 | M.H. Shenk, H.E. Brewer | Blacksmithing Apparatus | portable forges |
| 599,265 | Feb. 15, 1898 | D.O. Smith | Apparatus for Boring Locomotive Cylinders | portable metal drilling machines |
| 614,866 | Nov. 29, 1898 | W.E. Hotchkiss | Automatic feeding-mechanism for drilling-machines | drill presses |
| 647,311 | Apr. 10, 1900 | G.J. Spahn, W.T. Maxwell | Boring implement | hand drills |
| 676,043 | Jun. 11, 1901 | J.C. Lincoln | Electric drill | handheld power drills |
| 687,025 | Nov. 19, 1901 | B.E. Hervey | Boring and Drilling Machine | woodworking horizontal borers |
| 941,568 | Nov. 30, 1909 | F. Fleming | Combined Drill and Stay Bolt Cutter | boiler repair tools |
| 983,083 | Jan. 31, 1911 | J.A. Pealing | Portable drill | portable metal drilling machines |
| 1,103,783 | Jul. 14, 1914 | G.O. Leopold | Drill | drill presses |
