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Patents for John Merckens | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 825,401 | Jul. 10, 1906 | J. Merckens | Wrench | |
![]() | 828,859 | Aug. 14, 1906 | J. Merckens | Combined Wrench and Thread Retracing Tool |