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| All Patents in class 123/41.5 | |||||
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| Number | Date | Patentee | Title | Type | |
| 449,507 | Mar. 31, 1891 | G.J. Weber | Gas Engine | gas and gasoline engines | |
| 532,980 | Jan. 22, 1895 | F.P. Mill | Gas Engine | gas and gasoline engines | |
| 584,188 | Jun. 08, 1897 | S.D. McLelland, P.B. McLelland | Gas or Vapor Engine | ||