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| All Patents in class 92/45 | |||||
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| Number | Date | Patentee | Title | Type | |
| 754,467 | Mar. 15, 1904 | N. Lombard | Relief Valve | relief valves | |
| 1,349,884 | Aug. 17, 1920 | F.H. Hopkins | Diaphragm Gage | vacuum and pressure gauges | |