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| All Patents in class 301/81 | |||||
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| Number | Date | Patentee | Title | Type | |
| 195,145 | Sep. 11, 1877 | S.G. Mason | Improvement in vehicle-hubs | wagon and cart wheels, axles and hubs | |
| 1,411,391 | Apr. 04, 1922 | J.D. Tucker | Spoke Tightener | wheelwright | |