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| All Patents in class 280/47.131 | |||||
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| Number | Date | Patentee | Title | Type | |
| 426,474 | Apr. 29, 1890 | C.C. Smalley, C.F. Smalley | Truck-frame for tread-powers | ||
| 6,929,275 | Aug. 16, 2005 | P.E. Schlangen | Person transport wheelchair | ||