| All Patents in class 144/70 |
Patents 1 -
10
of 20
      |
| Picture | Number | Date | Patentee | Title |
 | 115 | Jan. 31, 1837 | J.H. Power | Portable multi-drill mortiser |
 | 164,295 | Jun. 08, 1875 | C.J. Hardee | Improvement in lock-mortising machines |
| | 393,817 | Dec. 04, 1888 | W.H. Clapp | Portable multi-drill mortising machine |
 | 479,377 | Jul. 19, 1892 | A.L. Newton | Mortising auger |
 | 481,383 | Aug. 23, 1892 | G.A. Adams | Portable boring and mortising machine |
 | 513,088 | Jan. 23, 1894 | H.W. Crane | Portable multi-drill mortiser |
| | 651,315 | Jun. 05, 1900 | I. Schurman | Multi-drill lock mortiser |
 | 658,782 | Oct. 02, 1900 | W.T. Kellogg | Auger-cutter |
 | 661,135 | Nov. 06, 1900 | G.F. Andrews | Hand-cranked portable auger mortiser |
| | 838,827 | Dec. 18, 1906 | J.S. Waugh | Portable door-mortising machine |
