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| All Patents in class 91/212 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,426 | Feb. 07, 1844 | E.A. Lester | Oscillating Steam Engine | oscillating steam engines | |
| 106,860 | Aug. 30, 1870 | A. Nittinger, Jr. | Oscillating Steam-Engine | oscillating steam engines | |
| 755,733 | Mar. 29, 1904 | T. Barrow | Motor | pneumatic motors | |