| All Patents in class 123/72 |
Patents 1 -
10
of 12
      |
| Picture | Number | Date | Patentee | Title |
| | 155,087 | Sep. 15, 1874 | J. Hirsch | Hot Air Engines |
| | 280,083 | Jun. 26, 1883 | C. Rohn | Gas Engine |
 | 328,970 | Oct. 27, 1885 | J.F. Place | Gas Engine |
| | 345,998 | Jul. 20, 1886 | R.F. Smith | Gas Engine |
| | 347,656 | Aug. 17, 1886 | R.F. Smith | Gas Engine |
| | 353,402 | Nov. 30, 1886 | J.H. Clark | Reversible Gas Engine |
 | 415,446 | Nov. 19, 1889 | J. Charter | Hydrocarbon or Gas Engine |
 | 477,295 | Jun. 21, 1892 | J.A. Charter | Gas Engine |
| | 576,604 | Feb. 09, 1897 | L.H. Nash | Gas Engine |
| | 618,638 | Jan. 31, 1899 | E. Brillié | Explosive Motor |
