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| Patents for R. A. Thomas | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,410,816 | Mar. 28, 1922 | W.M. Lawrence | Spark Plug Wrench | screw adjust wrenches | |
| 1,437,774 | Dec. 05, 1922 | J.C. Piechocki, E.K. Boinski | Wrench | quick adjust wrenches | |