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| Patents for E. R. McKenzie | |||||
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| Number | Date | Patentee | Title | Type | |
| 960,480 | Jun. 07, 1910 | E.N. Boswell, F. Allner | Planer Attachment | metal planer accessories | |
| 1,032,397 | Jul. 16, 1912 | C.M. Gardiner | Safety-lever attachment for power-presses | punch presses | |