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