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| All Patents in class 409/136 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,185,376 | Jan. 29, 1980 | R. Johnstone | Unmanned Machining Center With Tool Checking | numerically controlled milling machines | |
| 4,640,652 | Feb. 03, 1987 | J.C. Rivera, Jr. | Coolant Delivery System | coolant apparatus | |