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| All Patents in class 73/747 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 5,552 | May 09, 1848 | P. Stillman | Steam and Vacuum Gage | ||
| RE205 | Jul. 29, 1851 | P. Stillman | Improvement in Steam and Vacuum Gages | ||
| 841,454 | Jan. 15, 1907 | C.E. Sargent | Pressure Gage | ||