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| All Patents in class 108/20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,789,562 | Jan. 20, 1931 | J.H. Penniman, J.G. Collins | Revoluble display stand | ||
| 4,080,009 | Mar. 21, 1978 | J.C. Scherer, O.W. Ehrhardt, B.C. Cuppan, S.M. Marathe | Servostatic Bearing System With Variable Stiffness | metalworking machine bearings | |