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| Patents for Earl Cannon | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,127,324 | Aug. 16, 1938 | E. Cannon | Prefill valve for hydraulic presses | hydraulic metalworking presses | |
| 2,152,837 | Apr. 04, 1939 | E. Cannon | Prefill valve for hydraulic presses | hydraulic metalworking presses | |