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| All Patents in class 92/156 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,132,649 | Mar. 23, 1915 | B. Brazelle | Pneumatic tool | pneumatic tools | |
| 2,386,117 | Oct. 02, 1945 | R.M. Hvid | Engine Piston Construction | pistons | |
| 2,430,394 | Nov. 04, 1947 | R.H. Shepard, B.E. Folke | Hydraulic Pump | hydraulic pumps | |