| All Patents in class 83/693 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 314,221 | Mar. 24, 1885 | C.M. Carnahan | Machine for Splitting Bars and Sheets of Iron or Steel | punch presses |
| 1,531,287 | Mar. 31, 1925 | J. Jensen | Angle-Iron Notcher | metal punching machines |
| 1,775,787 | Sep. 16, 1930 | U.F. Steindorff, H.J. Heller | Power-driven shears | metal shearing machines |
| 3,033,066 | May 08, 1962 | E. Coulon | Apparatus for Slotting the Ends of Tubing | pipe and tube notchers |
| 3,153,963 | Oct. 27, 1964 | H.J. May, E.I. Coulon | Apparatus for Shearing the Ends of Tubing | pipe and tube notchers |
| 3,180,196 | Apr. 27, 1965 | H.J. May, E.I. Coulon | Apparatus for Shearing the Ends of a Tubular Member | pipe and tube notchers |
| 3,277,763 | Oct. 11, 1966 | V.L. Haug | Notching Machine | notching machines |
| 3,616,719 | Nov. 02, 1971 | R.B. Tassie | Notching sheet material | notching machines |
| 4,562,760 | Jan. 07, 1986 | R.J. Kinsley | Tube Notching Apparatus | pipe and tube notchers |
