| All Patents in class 123 |
Patents 16 -
30
of 1718
      |
| Number | Date | Patentee | Title | Type |
| 27,677 | Apr. 03, 1860 | E. Armstrong | Steam Puppet Valve | steam engine valves |
| 30,701 | Nov. 20, 1860 | S. Wilcox, Jr. | Air Engine | hot air engines |
| 31,722 | Mar. 19, 1861 | J.J. Lenoir | Air Engine | hot air engines |
| 32,455 | May 28, 1861 | P. Shaw | Hot Air Engine | hot air engines |
| 36,581 | Sep. 30, 1862 | M.D. Whipple | Hot Air Engine | hot air engines |
| 37,299 | Jan. 06, 1863 | H. Messer | Air Engine | hot air engines |
| 39,448 | Aug. 04, 1863 | O.H. Kratze | Gas Engine | gas and gasoline engines |
| 40,805 | Dec. 08, 1863 | J. Arbós | Gas Engine | gas and gasoline engines |
| 41,299 | Jan. 19, 1864 | P. Hugon | Gas Engine | gas and gasoline engines |
| 42,336 | Apr. 19, 1864 | E.D. Ashe | Propeller Engine | rotary steam engines |
| 44,572 | Oct. 04, 1864 | S.L. Wiegand | Gas Engine | gas and gasoline engines |
| 46,084 | Jan. 31, 1865 | M.G. Crane | Hot Air Engine | hot air engines |
| RE1,942 | Apr. 25, 1865 | S. Wilcox, Jr. | Air Engine | hot air engines |
| 49,346 | Aug. 08, 1865 | P. Hugon | Gas Engine | gas and gasoline engines |
| 50,506 | Oct. 17, 1865 | C. Stevens | Hot Air Engine | hot air engines |
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