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| All Patents in class 33/517 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,439,321 | Dec. 19, 1922 | W.M. Page | Bearing Gauge | measurement gauges | |
| 1,656,302 | Jan. 17, 1928 | C.S. Swaney | Bearing Clearance Micrometer | micrometers | |
| 1,839,596 | Jan. 05, 1932 | C.N. Rouse | Micrometer | micrometers | |
| 2,134,372 | Oct. 25, 1938 | T.A. Olson | Gauge | measurement gauges | |
| 2,807,973 | Oct. 01, 1957 | H.J. Siekmann, W.H. Meyer, administrator, W.R. Meyer, deceased (estate of) | Apparatus for Manufacturing Crankshafts Automatically | crankshaft lathes | |