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| Patents for Robert Elder | |||||
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| Picture | Number | Date | Patentee | Title | |
| 789,846 | May 16, 1905 | E.H. McHenry, R. Elder | Scale | ||
| 1,007,343 | Oct. 31, 1911 | W.T. Krausch, R. Elder | Hoisting Mechanism | ||
| 1,122,708 | Dec. 29, 1914 | W.T. Krausch, R. Elder | Hoisting and Conveying Mechanism | ||
| 1,195,568 | Aug. 22, 1916 | T.C. Kennedy, R. Elder | Apparatus for Loading Cars | ||
| 1,285,080 | Nov. 19, 1918 | R. Elder | Material Handling Apparatus | ||