| All Patents in class 123/44R |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 548,628 | Oct. 29, 1895 | G.F. Conner | Gas Engine |
| | 573,174 | Dec. 15, 1896 | S.M. Balzer | Motor or Engine |
| | 653,040 | Jul. 03, 1900 | T.B. Royse | Gas Engine |
| | 668,617 | Feb. 26, 1901 | W.H. Aldrich | Rotary Gas Engine |
| | 831,048 | Sep. 18, 1906 | F.O. Farwell | Gas Engine |
 | 1,019,856 | Mar. 12, 1912 | J.L. Strickland | Rotary internal-combustion engine |
| | 1,174,459 | Mar. 07, 1916 | A.E. Winckler | Explosive Engine |
| | 1,287,550 | Dec. 10, 1918 | A.E. Winckler | Explosive Engine |
 | 1,382,611 | Jun. 28, 1921 | B.F. Augustine | Rotary Gas Engine |
