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| All Patents in class 318/468 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,411,712 | Apr. 04, 1922 | F. Diehl | Time-controlled motor | ||
| 1,911,574 | May 30, 1933 | J.D. Karle | Commutator Slotting Machine | ||
 | 2,294,831 | Sep. 01, 1942 | R.W. Carson | Apparatus for Making Very Fine Measurments | |
| 3,350,617 | Oct. 31, 1967 | J. Firth | Positioning Device for Use on Machine Tools | ||