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| Patents for J. D. Thornburgh | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 962,717 | Jun. 28, 1910 | V.J. O'Brien | Valve for Hammer Drills | |
 | 1,015,902 | Jan. 30, 1912 | N.E. Meredith | Valve Grinder | |
 | 1,044,517 | Nov. 19, 1912 | B.C. Hallgren | Valve Lifting Device | |