| All Patents in class 123/51B |
Patents 16 -
26
of 26
      |
| Number | Date | Patentee | Title | Type |
| 618,638 | Jan. 31, 1899 | E. Brillié | Explosive Motor | gas and gasoline engines |
| 637,450 | Nov. 21, 1899 | J.B. Doolittle | Gasolene Engine | gas and gasoline engines |
| 657,226 | Sep. 04, 1900 | M.F. Marmonier | Multiple-Piston Explosion-Motor | gas and gasoline engines |
| 662,155 | Nov. 20, 1900 | A.J. Signor | Multiple Cylinder Explosive Engine | internal combustion engines |
| 1,229,569 | Jun. 12, 1917 | B.F. Augustine | Rotary Engine | rotary engines |
| 1,382,611 | Jun. 28, 1921 | B.F. Augustine | Rotary Gas Engine | rotary engines |
| 1,557,395 | Oct. 13, 1925 | B.F. Augustine | Rotary Gas Engine | rotary engines |
| 2,035,096 | Mar. 24, 1936 | H. Schneider | Engine Accessory Drive | internal combustion engines |
| 2,244,323 | Jun. 03, 1941 | H. Davids, A.K. Antonsen | Internal Combustion Engine | opposed piston engines |
| 2,260,975 | Oct. 28, 1941 | R.M. Hvid | Internal Combustion Engine | oil engines |
| 3,534,715 | Oct. 20, 1970 | A.K. Antonsen | Opposed Piston Engine Having Improved Cylinder Liner Cooling | opposed piston engines |
