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| All Patents in class 384/288 | |||||
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| Number | Date | Patentee | Title | Type | |
| 429,697 | Jun. 10, 1890 | C.H. Norton | Grinding Machine | grinders | |
| 2,723,003 | Nov. 08, 1955 | A.K. Antonsen | Crankshaft Bearing Lubrication | internal combustion engine lubrication | |