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| All Patents in class 92/128 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,138,194 | Nov. 29, 1938 | E.M. Pfauser | Hydraulic Pump | hydraulic pumps | |
| 2,987,046 | Jun. 06, 1961 | N.F. Atherton | Ram Assemblage | ||
| 3,361,433 | Jan. 02, 1968 | W.B. Holdridge | Collet Closer | collet closers | |