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All Patents in class 33/632 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 407,617 | Jul. 23, 1889 | F.A. Seaver | Centering Device | |
![]() | 1,406,262 | Feb. 14, 1922 | M.R. Kronert | Tool for Laying Out Keyways | |
1,422,746 | Jul. 11, 1922 | K.W. Couse | Keyway Locator |