| All Patents in class 72/100 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
| | 60,067 | Nov. 27, 1866 | D.T. Sanford | Ornamenting Metal Tubes |
 | 231,094 | Aug. 10, 1880 | T.T. Prosser | File-cutting machine |
 | 352,652 | Nov. 16, 1886 | P. Medart | Machine for Straightening Metal Bars or Pipes |
 | 352,705 | Nov. 16, 1886 | P. Medart | Machine for straightening metal bars or pipes |
 | 352,706 | Nov. 16, 1886 | P. Medart | Machine for straightening metal bars or pipes |
| | 432,232 | Jul. 15, 1890 | J.F. Fife | Machine for Corrugating Wrought Metal Tubing |
| | 538,775 | May 07, 1895 | H. Green, C.J. Green | Rolling Mill |
| | 2,148,805 | Feb. 28, 1939 | S.A. Cogsdill | Method of Making Oil Hole Drills |
 | 2,715,846 | Aug. 23, 1955 | E. Grob, B. Grob | Method of groove forming |
| | 2,959,077 | Nov. 08, 1960 | L.S. Heym | Tube mill |
