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| All Patents in class 123/41.56 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 300,453 | Jun. 17, 1884 | E. Edwards | Gas Engine | ||
 | 312,494 | Feb. 17, 1885 | L.H. Nash | Gas Engine | |
| 640,890 | Jan. 09, 1900 | J.E. Eisenhuth | Air and Gas Engine | ||
| 661,439 | Nov. 06, 1900 | E. Boulier, A. Boulier | Explosion Engine | ||
| 1,843,162 | Feb. 02, 1932 | A.C. Boock, C.B. Jahnke | Power Plant | ||
| 2,326,335 | Aug. 10, 1943 | W.C. Dehn | Air Cooling of Engines | ||
| 2,341,789 | Feb. 15, 1944 | J.E. Justus | Cooling System for Internal Combustion Engines | ||