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| Patents for Ashton Valve Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,001,375 | May 14, 1935 | H.S. Baker | Safety Valve | steam safety valves | |
| 2,034,222 | Mar. 17, 1936 | H.S. Baker | Valve | steam safety valves | |
| 2,040,681 | May 12, 1936 | H.S. Baker | Gauge | vacuum and pressure gauges | |
| D100,838 | Aug. 18, 1936 | J.W. Motherwell, H.S. Baker | Design for a Combined Gauge and Illumination Housing | gauge illuminating apparatus | |
| 2,137,972 | Nov. 22, 1938 | J.W. Motherwell, H.S. Baker | Illuminated gauge | gauge illuminating apparatus | |