| All Patents in class 417/500 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 1,262,979 | Apr. 16, 1918 | W.H. Putnam | Force-feed lubricator | lubricators |
| 2,369,345 | Feb. 13, 1945 | B.E. Folke | Hydraulic Pump | hydraulic pumps |
| 2,420,984 | May 20, 1947 | R.H. Shepard | Hydraulic Pump | hydraulic pumps |
| 2,430,394 | Nov. 04, 1947 | R.H. Shepard, B.E. Folke | Hydraulic Pump | hydraulic pumps |
| 2,436,492 | Feb. 24, 1948 | R.H. Shepard | Pumping Units for Mechanical Lubricators | industrial machine lubrication |
| 2,467,916 | Apr. 19, 1949 | R.H. Shepard | Hydraulic Pump | hydraulic pumps |
| 2,474,661 | Jun. 28, 1949 | R.H. Shepard, B.E. Folke | Lubricating Device | gas turbine lubricators |
| 2,517,645 | Aug. 08, 1950 | C.F. Erikson | Pumping Mechanism | reciprocating pumps |
