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| All Patents in class 33/394 | |||||
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| Number | Date | Patentee | Title | Type | |
| 854,931 | May 28, 1907 | A. Crotchett | Plumb Bob | plumb bobs | |
| 1,124,595 | Jan. 12, 1915 | D. Bertolino, J. Dailey | Plumb Bob | plumb bobs | |