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| All Patents in class 310/80 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 809,348 | Jan. 09, 1906 | M.T. Weston | Power Hammer | |
 | 973,216 | Oct. 18, 1910 | G.H. Rowe | Electromechanical device | |
 | 1,024,026 | Apr. 23, 1912 | G.H. Rowe | Electromechanical device | |
 | 1,062,799 | May 27, 1913 | G.H. Rowe | Rock drill | |