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| Patents for R. W. Irwin | |||||
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| Number | Date | Patentee | Title | Type | |
| 838,089 | Dec. 11, 1906 | A.A. Dennis | Veneer-gluing machine | veneer machines | |
| RE12,621 | Mar. 19, 1907 | A.A. Dennis | Veneer-gluing machine | veneer machines | |
| RE13,034 | Nov. 02, 1909 | A.A. Dennis | Process for gluing veneers | veneer machines | |