| All Patents in class 91/2 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 627,385 | Jun. 20, 1899 | J. Brockie | Automatic Lathe | automatic lathes |
| 2,112,141 | Mar. 22, 1938 | H.C. Clay | Hydraulic Control for Variable Speed Transmissions | industrial machine speed and direction changing mechanisms |
| 2,132,540 | Oct. 11, 1938 | G.R. Squibb, H.L. Pope | Broaching Machine | broaching machines |
| 2,137,462 | Nov. 22, 1938 | M. Romaine | Index Head | indexers and dividers |
| 2,349,838 | May 30, 1944 | C. Granqvist, H.V. Alexandersson | Micrometer | micrometers |
| 2,660,985 | Dec. 01, 1953 | H. Ernst | Hydraulic Feed System | hydraulic apparatus |
| 2,671,292 | Mar. 09, 1954 | E.Y. Seborg, H.J. Caldwell | Control Mechanism for Honing Machines | machine tool controls |
| 3,142,206 | Jul. 28, 1964 | W.W. Hague, G.A. Householder | Control system for impact device | drop hammers |
