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| Patents for Robert Dobberman | |||||
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| Picture | Number | Date | Patentee | Title | |
| 991,431 | May 02, 1911 | W.O. Duntley | Controller for electric drills | ||
 | 1,043,813 | Nov. 12, 1912 | M.A. Duquett | Chain Pipe-Wrench | |
 | 1,224,272 | May 01, 1917 | W.H. Callan | Unloader for Air Compressors | |
 | 1,336,754 | Apr. 13, 1920 | R. Parmelee | Vise | |
 | 1,336,755 | Apr. 13, 1920 | R. Parmelee | Vise | |