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| All Patents in class 280/486 | |||||
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| Number | Date | Patentee | Title | Type | |
| 289,098 | Nov. 27, 1883 | M.E. Hershey | Draft Attachment for Portable Engines | portable steam engines | |
| 677,332 | Jul. 02, 1901 | J.B. Bartholomew | Traction Engine | steam traction engines | |
| 1,290,813 | Jan. 07, 1919 | I.A. Weaver | Towing-pole | vehicle mechanic | |