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| All Patents in class 409/186 | |||||
| Picture | Number | Date | Patentee | Title | |
| 1,712,580 | May 14, 1929 | J.R. Parker | Slotting Machine | ||
| 2,437,317 | Mar. 09, 1948 | D.J. Davis | Spot milling tubular blank for propeller blades | ||
| 2,728,268 | Dec. 27, 1955 | P.F. Ochotschinsky, M.V. Waters, R.N. Clifton | Concavity Generating Milling Machine | ||
| 3,041,940 | Jul. 03, 1962 | H.W. De Pree, G.H. Schurger | Machine Tool | ||
| 5,829,932 | Nov. 03, 1998 | J.K. Jourdan, C.J. Kis, P.A. Beyer, P.A. Huck | Machine Alignment Compensation Actuator System | ||