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| Patents for American Steam Gauge & Valve Mfg. Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,349,884 | Aug. 17, 1920 | F.H. Hopkins | Diaphragm Gage | vacuum and pressure gauges | |
| 1,363,415 | Dec. 28, 1920 | F.H. Hopkins | Differential Pressure Gage | vacuum and pressure gauges | |
| 1,404,770 | Jan. 31, 1922 | F.H. Hopkins | Air Brake Recording Apparatus | industrial recording apparatus | |
| 1,404,771 | Jan. 31, 1922 | F.H. Hopkins | Compensating Thermometer | temperature gauges | |