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| Patents for Joseph R. Roubik | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,863,362 | Dec. 09, 1958 | J.R. Roubik, T.A. Wetzel | Tracer Mechanism | milling machines | |
| CA-606,994 | Oct. 18, 1960 | T.A. Wetzel, J.R. Roubik | Tracer mechanism | milling machines | |