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| All Patents in class 219/523 | |||||
| Number | Date | Patentee | Title | Type | |
| 201,592 | Mar. 26, 1878 | J.L. Brown | Improvement in spoke-dressing machines | wheelwright | |
| 1,485,890 | Mar. 04, 1924 | H.F. Shepherd | Hot Plug | ignition systems | |