| All Patents in class 409/143 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 42,616 | May 03, 1864 | W. Wright | Improved machine for boring curved cylinders |
| | 389,389 | Sep. 11, 1888 | F. Josett | Tool for Cutting Tapering or Irregularly Shaped Holes |
| | 638,712 | Dec. 12, 1899 | C.P. Higgins | Rabbeting Machine for Oval Hand Holes |
 | 795,420 | Jul. 25, 1905 | W.L. Schellenbach | Key-seating tool |
 | 1,227,304 | May 22, 1917 | H.A. Pedrick | Ring-cutting machine |
 | 1,669,423 | May 15, 1928 | C.H. Schmidgall | Boring tool |
| | 1,744,857 | Jan. 28, 1930 | W.D. Archea | Milling Machine |
| | 2,054,168 | Sep. 15, 1936 | E.G. Roehm | Eccentric Miller |
| | 2,091,000 | Aug. 24, 1937 | W. Hoier | Internal Milling Machine |
| | 3,131,584 | May 05, 1964 | E.L. McFerren | Horizontal Boring Machine |
