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Patents for Henry T. Weirbach | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 358,176 | Feb. 22, 1887 | H.T. Weirbach | Machine for turning spirals | |
![]() | 1,014,794 | Jan. 16, 1912 | H.T. Weirbach | Cutter-head |