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| Patents for Robert M. Barr | |||||
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| Number | Date | Patentee | Title | Type | |
| 170,909 | Dec. 07, 1875 | H.S. Smith | Improvement in barrel-shaping machines | barrel making machines | |
| 183,821 | Oct. 31, 1876 | H.S. Smith | Improvement in the manufacture of staves | barrel making machines | |
| 188,787 | Mar. 27, 1877 | W.H. Ewing | Improvement in machines for setting up barrels | barrel making machines | |
| 1,054,700 | Mar. 04, 1913 | W.H. Lutz | Compression Wrench | chain and strap wrenches | |