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| Patents for John R. McDonald | |||||
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| Number | Date | Patentee | Title | Type | |
| 607,566 | Jul. 19, 1898 | C. Jacobson | Gas Engine | gas and gasoline engines | |
| 2,300,047 | Oct. 27, 1942 | O.M. Jensen, F.T. Wruk, J.R. McDonald | Hydraulically controlled metal hack saw | power hacksaws | |