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| Patents for Robert J. Denio | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,043,406 | Nov. 05, 1912 | R.J. Denio | Clutch | |
 | 1,684,729 | Sep. 18, 1928 | R.J. Denio | Automobile elevating apparatus | |
 | 1,971,600 | Aug. 28, 1934 | R.J. Denio | Notebook holder | |