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| Patents for Paul R. Guirl | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,030,562 | Feb. 11, 1936 | P.R. Guirl, H. Barnes (executrix), J.S. Barnes (deceased, estate of) | Metal Working Apparatus | |
| 2,042,379 | May 26, 1936 | P.R. Guirl, J.S. Barnes | Metal Working Apparatus | ||
| 2,114,284 | Apr. 19, 1938 | J.S. Barnes (deceased, estate of), H. Barnes (executrix), E.J. Svenson, P.R. Guirl | Machine Tool and Control Therefor | ||
 | RE20,974 | Jan. 10, 1939 | J.S. Barnes (deceased, estate of), P.R. Guirl | Metal Working Apparatus | |