| All Patents in class 408/112 |
Patents 1 -
10
of 22
      |
| Picture | Number | Date | Patentee | Title |
 | 36,903 | Nov. 11, 1862 | W.S. Hadley | Tapping Guide |
 | 94,870 | Sep. 14, 1869 | W.A. Clark | Improved Washer-Cutter |
 | 100,772 | Mar. 15, 1870 | D. Kelly | Centerer |
 | 132,646 | Oct. 29, 1872 | S.C. Ellis | Improvement in machines for boring blind-stiles |
| | 143,738 | Oct. 14, 1873 | H.E. Whipple | Washer-Cutters |
| | 393,817 | Dec. 04, 1888 | W.H. Clapp | Portable multi-drill mortising machine |
| | 521,206 | Jun. 12, 1894 | F.B. Covel | Centering Tool |
| | 568,932 | Oct. 06, 1896 | S.W. Wilcox | Bit-centering device |
| | 592,912 | Nov. 02, 1897 | M. Johnson | Centering Drill Chuck |
| | 614,848 | Nov. 29, 1898 | T.J. Doran | Hand-operated drill |
