| All Patents in class 123/71R |
Patents 16 -
21
of 21
      |
| Number | Date | Patentee | Title | Type |
| 627,220 | Jun. 20, 1899 | E.J. Woolf | Air and Gas Engine | gas and gasoline engines |
| 651,780 | Jun. 12, 1900 | H.A. Dawson, H.T. Dawson | Internal-Combustion Motor | gas and gasoline engines |
| 859,501 | Jul. 09, 1907 | F. Lamplough | Internal Combustion Engine | internal combustion engines |
| 1,075,545 | Oct. 14, 1913 | J.F. Buhr | Explosive Engine | |
| 1,136,488 | Apr. 20, 1915 | C.E. Sargent | Gas Driven Air Compressor | gas and gasoline engines |
| 1,718,934 | Jul. 02, 1929 | E.T. Adams | Internal Combustion Engine | internal combustion engines |
