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| Patents for P. H. Truman | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 938,708 | Nov. 02, 1909 | G.H. Rowe | Stamp mill | |
 | 938,709 | Nov. 02, 1909 | G.H. Rowe | Electromechanical device | |
 | 973,216 | Oct. 18, 1910 | G.H. Rowe | Electromechanical device | |
 | 1,024,025 | Apr. 23, 1912 | G.H. Rowe | Percussion device | |
 | 1,024,026 | Apr. 23, 1912 | G.H. Rowe | Electromechanical device | |
 | 1,024,027 | Apr. 23, 1912 | G.H. Rowe | Electromechanical device | |
 | 1,062,799 | May 27, 1913 | G.H. Rowe | Rock drill | |