| All Patents in class 72/100 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 60,067 | Nov. 27, 1866 | D.T. Sanford | Ornamenting Metal Tubes | embossing and knurling machines |
| 231,094 | Aug. 10, 1880 | T.T. Prosser | File-cutting machine | tool making machines |
| 352,652 | Nov. 16, 1886 | P. Medart | Machine for Straightening Metal Bars or Pipes | metal straightening machines |
| 352,705 | Nov. 16, 1886 | P. Medart | Machine for straightening metal bars or pipes | metal straightening machines |
| 352,706 | Nov. 16, 1886 | P. Medart | Machine for straightening metal bars or pipes | metal straightening machines |
| 432,232 | Jul. 15, 1890 | J.F. Fife | Machine for Corrugating Wrought Metal Tubing | tube corrugating machines |
| 538,775 | May 07, 1895 | H. Green, C.J. Green | Rolling Mill | rolling mills |
| 2,148,805 | Feb. 28, 1939 | S.A. Cogsdill | Method of Making Oil Hole Drills | metalworking twist drills |
| 2,715,846 | Aug. 23, 1955 | E. Grob, B. Grob | Method of groove forming | gear making machines |
| 2,959,077 | Nov. 08, 1960 | L.S. Heym | Tube mill | tube making machines |
| 3,464,251 | Sep. 02, 1969 | R.W. Johns | Tube Tapering Device With Variable Die Orifice | metal swaging machines |
