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| All Patents in class 451/482 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,179,465 | Nov. 07, 1939 | J.Y. Blazek | Crankshaft grinder | vehicle mechanic | |
| 2,290,730 | Jul. 21, 1942 | J.Y. Blazek | Grinding device | crankshaft maintenance | |