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