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| Patents for J. R. Keller | |||||
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| Number | Date | Patentee | Title | Type | |
| 784,903 | Mar. 14, 1905 | F.J. Stemmrich | Combination Gage | surface gauges | |
| 825,648 | Jul. 10, 1906 | J.F. Haworth | Violin-Makers' Calipers | calipers | |
| 953,346 | Mar. 29, 1910 | J. Newbauer | Wrench | quick adjust wrenches | |
| 1,254,141 | Jan. 22, 1918 | C.A. Humphreys | Gage | gauges | |
| 1,267,287 | May 21, 1918 | A. Silverman | Illuminator for Microscopes | ||