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| Patents for John Martin Barr | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,079,629 | Nov. 25, 1913 | J.M. Barr | Resistance-ring of rotors | induction motors | |
| 1,216,397 | Feb. 20, 1917 | B.F. Bailey, J.M. Barr, O.S. More, L.G. Long | Induction Motor | induction motors | |
| 1,285,589 | Nov. 26, 1918 | H.L. Barnes | Method of Making Drills | making drills and augers | |