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| Patents for Charles R. Maastricht | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,620,586 | Nov. 16, 1971 | C.R. Maastricht | Preload Spindle Bearing for Machine Tool | metalworking machine bearings | |
| 3,893,355 | Jul. 08, 1975 | C.R. Maastricht | Coolant Supply System for Cutting Tools in a Machine Tool | coolant apparatus | |