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| All Patents in class 91/14 | |||||
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| Number | Date | Patentee | Title | Type | |
| 722,055 | Mar. 03, 1903 | J. Storey, C.W. Taylor | Steam-Engine | steam engine valves | |
| 866,922 | Sep. 24, 1907 | W.O. Duntley | Engine | pneumatic tools | |