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| All Patents in class 73/509 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 194,041 | Aug. 14, 1877 | R.K. Huntoon | Improvement in apparatus for regulating the supply of steam to gas-exhausters | |
| 215,802 | May 27, 1879 | G.H. Corliss | Steam Pumping-Engines | ||
| 655,135 | Jul. 31, 1900 | S.F. Butler, G.W. Turner | Automatic Stop for Engines | ||
 | 727,466 | May 05, 1903 | E.J. Sederholm | Governor | |
 | 963,803 | Jul. 12, 1910 | J.L. Osborne | Combined Governor and Regulator for Air-Compressors | |
| 1,526,293 | Feb. 10, 1925 | C.R. Houghton | Governor | ||