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| All Patents in class 403/161 | |||||
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| Number | Date | Patentee | Title | Type | |
| 397,389 | Feb. 05, 1889 | F.H. Richards | Implement Joint | pliers | |
| 890,894 | Jun. 16, 1908 | G.W. Leonard, W.H. Ehrhart | Bit-Extender | drill bit extensions | |
| 1,026,367 | May 14, 1912 | H.P. Richards | Zigzag Rule Joint | folding rule joints | |