| All Patents in class 408/77 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 242,918 | Jun. 14, 1881 | S.H. Garrett | Boring Gage for Bits |
| | 266,991 | Nov. 07, 1882 | J. Hathaway | Portable Drill and Forge Rest |
 | 450,978 | Apr. 21, 1891 | J. Rogers | Work-centering apparatus |
| | 874,702 | Dec. 24, 1907 | E.J. Patton | Gasket or Washer Cutter |
 | 922,808 | May 25, 1909 | W.J. Parsons | Bit-gage |
| | 1,533,381 | Apr. 14, 1925 | E.L. Burton | Portable drill |
 | 1,676,206 | Jul. 03, 1928 | S.M. Ratliff | Traveling drilling machine |
| | 2,020,785 | Nov. 12, 1935 | D.C. Klausmeyer | Interlocked propelling and clamping means for mobile drills |
| | 2,278,988 | Apr. 07, 1942 | W.L. Groene | Boring Tool Holder |
| | 2,333,589 | Nov. 02, 1943 | L.L. Schauer | Drilling machine |
