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| All Patents in class 408/84 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 34,412 | Feb. 18, 1862 | F. Deluce | Centering Implement | |
 | 39,608 | Aug. 18, 1863 | F.B. Williams | Device for Centering Shafting | |
 | 100,772 | Mar. 15, 1870 | D. Kelly | Centerer | |
| 521,206 | Jun. 12, 1894 | F.B. Covel | Centering Tool | ||
| 592,912 | Nov. 02, 1897 | M. Johnson | Centering Drill Chuck | ||
| 606,985 | Jul. 05, 1898 | R.C. Wrege | Centering Tool for Lathes | ||
| 718,996 | Jan. 27, 1903 | W. Franz | Rivet Cutter | ||
| 2,383,953 | Sep. 04, 1945 | C.L. Beard | Drill guide | ||