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| Patents for R. M. Barr | |||||
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| Number | Date | Patentee | Title | Type | |
| 188,880 | Mar. 27, 1877 | W.H. Ewing | Improvement in machines for setting up barrels | barrel making machines | |
| 189,453 | Apr. 10, 1877 | G. Gocher | Grooved Cutter for Bead Planes | plane blades | |
| 207,441 | Aug. 27, 1878 | E.N. Porter | Picture-Frame Clamp | woodworkers vises | |