| All Patents in class 123/69R |
Patents 16 -
22
of 22
      |
| Number | Date | Patentee | Title | Type |
| 603,914 | May 10, 1898 | F.S. Mead | Gas or Oil Engine | oil engines |
| 607,613 | Jul. 19, 1898 | W.O. Worth | Hydrocarbon Gas Engine | gas and gasoline engines |
| 618,972 | Feb. 07, 1899 | C.R. Alsop | Gas Engine | gas and gasoline engines |
| 634,529 | Oct. 10, 1899 | A. Lee | Gas Engine | gas and gasoline engines |
| 1,316,346 | Sep. 16, 1919 | B.F. Augustine | Rotary Hydrocarbon Engine | rotary engines |
| 1,382,611 | Jun. 28, 1921 | B.F. Augustine | Rotary Gas Engine | rotary engines |
| 1,830,321 | Nov. 03, 1931 | A.W. Hubbell | Internal Combustion Engine | cylinder heads |
