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| All Patents in class 137/512.3 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 401,452 | Apr. 16, 1889 | L.H. Nash | Fuel Mixing Device for Gas Engines | |
| 434,695 | Aug. 19, 1890 | J.F. Daly, M.M. Barrett | Gas or Vapor Engine Attachment | ||
| 1,339,500 | May 11, 1920 | E.T. Larkin, C.A. Criqui | Pump | ||
 | 1,708,158 | Apr. 09, 1929 | E.H. Stedman | Valve structure for compressors | |
| 1,808,074 | Jun. 02, 1931 | F.F. Rike, W.P. Huffman | Valve | ||
| 2,131,871 | Oct. 04, 1938 | B.E. Folke | Injector Overflow Mechanism | ||
| 3,702,624 | Nov. 14, 1972 | H. Fries | Piston Pump | ||