| All Patents in class 408/112 |
Patents 1 -
15
of 22
      |
| Number | Date | Patentee | Title | Type |
| 36,903 | Nov. 11, 1862 | W.S. Hadley | Tapping Guide | tool holders |
| 94,870 | Sep. 14, 1869 | W.A. Clark | Improved Washer-Cutter | washer cutters |
| 100,772 | Mar. 15, 1870 | D. Kelly | Centerer | drill bits |
| 132,646 | Oct. 29, 1872 | S.C. Ellis | Improvement in machines for boring blind-stiles | windowblind machines |
| 143,738 | Oct. 14, 1873 | H.E. Whipple | Washer-Cutters | washer cutters |
| 393,817 | Dec. 04, 1888 | W.H. Clapp | Portable multi-drill mortising machine | mortising machines |
| 521,206 | Jun. 12, 1894 | F.B. Covel | Centering Tool | lathe tools |
| 568,932 | Oct. 06, 1896 | S.W. Wilcox | Bit-centering device | |
| 592,912 | Nov. 02, 1897 | M. Johnson | Centering Drill Chuck | drill press chucks |
| 614,848 | Nov. 29, 1898 | T.J. Doran | Hand-operated drill | drill presses |
| 718,996 | Jan. 27, 1903 | W. Franz | Rivet Cutter | bolt and rivet cutters |
| 1,831,813 | Nov. 17, 1931 | A. Levedahl | Centering guide | handheld power tool accessories |
| 2,242,510 | May 20, 1941 | S.A. Cogsdill | Adjustable countersink structure | metalworking countersinks |
| 2,308,055 | Jan. 12, 1943 | S.A. Cogsdill | Adjustable countersink structure | metalworking countersinks |
| 2,710,549 | Jun. 14, 1955 | S.A. Cogsdill | Micro-limit Countersink Driver | metalworking countersinks |
