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| Patents for J. W. Ruger Mfg. Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 596,239 | Dec. 28, 1897 | J.B. Fenner | Gas Engine | |
 | 681,391 | Aug. 27, 1901 | J.B. Fenner | Muffler for Gas or Other Engines | |
 | 685,978 | Nov. 05, 1901 | J.B. Fenner | Electric Igniter for Gas Engines | |
 | 705,058 | Jul. 22, 1902 | J.B. Fenner | Operating Mechanism for Gas Engine Valves, &c. | |
 | 706,916 | Aug. 12, 1902 | J.B. Fenner | Fuel Valve for Gas Engines | |