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| Patents for Lawrence O. Mankin | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,554,324 | Sep. 22, 1925 | M.L. Akers, R.S. Beeler | Gauge | |
 | 1,894,556 | Jan. 17, 1933 | H.J. Edlund | Device For Removing Screw Tops | |