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| All Patents in class 417/24 | |||||
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| Number | Date | Patentee | Title | Type | |
| 194,041 | Aug. 14, 1877 | R.K. Huntoon | Improvement in apparatus for regulating the supply of steam to gas-exhausters | ||
| 1,526,293 | Feb. 10, 1925 | C.R. Houghton | Governor | machine governors | |