| All Patents in class 137/540 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 122,756 | Jan. 16, 1872 | W. Camerer | Improvement in safety-valves | steam safety valves |
| 186,783 | Jan. 30, 1877 | H.G. Ashton | Improvement in Safety-Valve Attachments to Utilize the Escape-Steam | steam safety valves |
| 306,208 | Oct. 07, 1884 | R. Gould, H.G. Ashton | Safety Valves | steam safety valves |
| 465,480 | Dec. 22, 1891 | F.W. Lanchester | Gas Motor Engine | gas and gasoline engines |
| 1,346,921 | Jul. 20, 1920 | E. Terry | Automatic Valve | water valves |
| 2,123,826 | Jul. 12, 1938 | E.J. Dillman | Nozzle | water nozzles |
| 2,815,040 | Dec. 03, 1957 | R.V. Smith | Pressure relief valve | steam safety valves |
