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| Patents for Allen Governor Co. | |||||
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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 | |
 | 207,421 | Aug. 27, 1878 | R.K. Huntoon | Improvement in gas-exhaust regulators | |