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| All Patents in class 417/423.14 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,601,531 | Sep. 28, 1926 | H.W. Jeannin | Gas-proof motor housing | |
| 2,622,537 | Dec. 23, 1952 | R.D. Wortendyke | Pumping Mechanism | ||