| All Patents in class 92 |
Patents 16 -
30
of 241
      |
| Number | Date | Patentee | Title | Type |
| 67,659 | Aug. 13, 1867 | N.A. Otto, E. Langen | Gas Engine | gas and gasoline engines |
| 76,268 | Mar. 31, 1868 | W. Swayne | Piston | hot air engines |
| 78,911 | Jun. 16, 1868 | J.U. Adams | Piston Packing | steam engine packing |
| 82,437 | Sep. 22, 1868 | F.S. Pease | Compound Steam Engine | steam engines |
| 97,231 | Nov. 23, 1869 | J.B. Root | Steam Engine | steam engines |
| 102,704 | May 03, 1870 | G.H. Peek | Smith's Bellows | blacksmith |
| 103,212 | May 17, 1870 | H.E. Long | Rotary Steam Engine | steam engines |
| 109,372 | Nov. 22, 1870 | B. Fitts, P. Ball | Improvement in liquid-meters | |
| 113,144 | Mar. 28, 1871 | N.T. Coffin | Improvement in pumps | |
| 114,427 | May 02, 1871 | P. Estes | Improvement in Piston-Packings | piston ring and packing |
| 118,463 | Aug. 29, 1871 | C. Levey | Improvement in steam-engines | steam engines |
| 122,248 | Dec. 26, 1871 | D.A. Greene | Reciprocating Engines | steam engines |
| 125,166 | Apr. 02, 1872 | G.B. Brayton | Improvement in Gas Engines | gas and gasoline engines |
| 128,062 | Jun. 18, 1872 | C.W. Patten | Improvment in Rotary Steam-Engines | rotary steam engines |
| 129,635 | Jul. 16, 1872 | W.I. Weed | Improvment in Rotary Engines | rotary steam engines |
