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| Patents for John D. Bowman | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 348,185 | Aug. 31, 1886 | J.D. Bowman | Improvement in Stud-Wrenches | |
 | GB-188,701,396 | Jan. 28, 1887 | J.D. Bowman | Improved Stud-wrench | |