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| All Patents in class 222/333 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,473,785 | Nov. 13, 1923 | W.W. Gore | Dust Sprayer | ||
 | 2,705,093 | Mar. 29, 1955 | R.L. Carter | Pumps | |
| 3,083,644 | Apr. 02, 1963 | L.A. Botkin | Axial flow booster pump | ||