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| Patents for Harry E. Keithley | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,699,882 | Oct. 24, 1972 | H.E. Keithley, R.A. Helrigel | Knockout bar assembly for presses | metalworking presses | |
| 3,878,706 | Apr. 22, 1975 | H.E. Keithley, G.C. Berry | Knockout arrangement for presses | metalworking presses | |