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| All Patents in class 403/387 | |||||
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| Number | Date | Patentee | Title | Type | |
| 237,118 | Feb. 01, 1881 | P. Medart | Split belt-pulley | industrial machine pulleys and belt drive mechanisms | |
| 6,929,275 | Aug. 16, 2005 | P.E. Schlangen | Person transport wheelchair | ||