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| All Patents in class 222/394 | |||||
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| Number | Date | Patentee | Title | Type | |
| 217,176 | Jul. 01, 1879 | D. Lang, A. Linn, A.J. Ulscht | Improvement in apparatus for regulating pressure in fermenting-casks | brewing apparatus | |
| 2,137,786 | Nov. 22, 1938 | H.L. Schlosser | Spray Oiler | oil pumps | |
| 2,651,746 | Sep. 08, 1953 | J.J. Gano | Control Device | milling machines | |