| All Patents of Type: boring heads |
Patents 1 -
15
of 114
      |
| Number | Date | Patentee | Title | Type |
| 136,736 | Mar. 11, 1873 | J.K. Kacerovsky | Expanding Boring Tools | boring heads |
| 172,183 | Jan. 11, 1876 | A. Schwerter | Depthing Tool | boring heads |
| 200,285 | Feb. 12, 1878 | J. Hall | Boring and Drilling Apparatus | boring heads |
| 266,306 | Oct. 24, 1882 | D. O'Neil | Metal Boring Device | boring heads |
| 473,027 | Apr. 19, 1892 | W.J. Smith | Machine for Boring and Shaping | boring heads |
| 552,065 | Dec. 24, 1895 | J.B. King | Boring Tool | boring heads |
| 757,494 | Apr. 19, 1904 | W. Pohlman | Expansion Boring Tool | boring heads |
| 767,036 | Aug. 09, 1904 | H.W. Borchers | Tool Holder | boring heads |
| 802,737 | Oct. 24, 1905 | E.E. Davis | Expansion boring-tool | boring heads |
| 882,529 | Mar. 17, 1908 | R.N. Melvin | Reamer and Boring Head | boring heads |
| 973,542 | Oct. 25, 1910 | A. Muehlmatt | Boring-head for lathes, milling-machines, and the like | boring heads |
| 981,062 | Jan. 10, 1911 | H. Casler | Boring Head | boring heads |
| 1,046,740 | Dec. 10, 1912 | E.E. Davis | Boring-tool | boring heads |
| 1,066,878 | Jul. 08, 1913 | S. Blocksom | Adjustable Boring Head | boring heads |
| 1,078,611 | Nov. 18, 1913 | E.E. Davis | Boring-tool | boring heads |
