All Patents of Type: spiral drills |
Patents 1 -
6
of 6
|
Number | Date | Patentee | Title | Type |
24,005 | May 17, 1859 | M.S. Brooks | Drill-stock | spiral drills |
54,069 | Apr. 17, 1866 | D.F. Hartford | Improvement in drill-stocks | spiral drills |
143,084 | Sep. 23, 1873 | J.K. Laudermilch | Improvement in jeweler's drilling devices | spiral drills |
463,507 | Nov. 17, 1891 | H.E. Goodell, A.D. Goodell | Push Drill | push drills |
529,401 | Nov. 20, 1894 | H. Pratt, W.H. McCoy | Spiral screw driver and drill | spiral screwdrivers |
1,022,311 | Apr. 02, 1912 | T.J. Fegley | Spiral Screw-Driver and Drill | spiral screwdrivers |