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| Patents for J. Frederick Acker | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 444,995 | Jan. 20, 1891 | W. Vanderman | Pipe or rod cutter | |
 | 553,124 | Jan. 14, 1896 | C.A. Meister | Angle Attachment for Dental Handpieces or other Attachment | |