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| Patents for William R. Siebert | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,772,961 | Nov. 20, 1973 | W.R. Siebert | Hydrostatic Rotary Table | rotary tables | |
| 3,871,721 | Mar. 18, 1975 | W.R. Siebert | Pre Loaded Hydrostatic Way Bearing | metalworking machine mechanisms | |