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| All Patents in class 60/622 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 437,973 | Oct. 07, 1890 | E. Butler | Motor | |
| 448,369 | Mar. 17, 1891 | D.S. Regan | Vapor Engine | ||
| 575,326 | Jan. 19, 1897 | H.S. Bristol | Gas Engine | ||
| 577,160 | Feb. 16, 1897 | W. Donaldson | Gas Motor | ||
| 596,352 | Dec. 28, 1897 | E.R. Bales | Compound Gas Engine | ||
 | 627,219 | Jun. 20, 1899 | E.J. Woolf | Air and Gas Engine | |
| 640,711 | Jan. 02, 1900 | J.A. Secor | Explosive Engine | ||
| 640,890 | Jan. 09, 1900 | J.E. Eisenhuth | Air and Gas Engine | ||
| 652,909 | Jul. 03, 1900 | C.L. Mayhew | Gas Motor | ||