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| All Patents in class 73/729.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 29,646 | Aug. 14, 1860 | A.J. Allen | Steam Pressure Gage | steam pressure gauges | |
| 1,044,678 | Nov. 19, 1912 | C.J. Manning | Recording Low Pressure Gage | pressure indicators | |
| 1,349,884 | Aug. 17, 1920 | F.H. Hopkins | Diaphragm Gage | vacuum and pressure gauges | |
| 1,997,917 | Apr. 16, 1935 | A. Von Wangenheim, P.S. Russel | Gauge | gauges | |