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| All Patents in class 417/22 | |||||
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| Number | Date | Patentee | Title | Type | |
| 727,466 | May 05, 1903 | E.J. Sederholm | Governor | steam engine governors | |
| 963,803 | Jul. 12, 1910 | J.L. Osborne | Combined Governor and Regulator for Air-Compressors | air compressor controllers | |