| All Patents in class 408/152 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 9,562 | Jan. 25, 1853 | T. Prosser | Expanding drill | drilling and boring |
| 10,872 | May 02, 1854 | A. Weeks | Expansion-bit | adjustable drill bits |
| 130,880 | Aug. 27, 1872 | W.F. Strong | Improvement in Bolt Cutters | bolt and rivet cutters |
| 260,497 | Jul. 04, 1882 | W.L. Parmelee | Improvements in Expansion-Bits | adjustable drill bits |
| 273,874 | Mar. 13, 1883 | C.H. Miller | Attachment for Pipe Tongs or Wrenches | wrench jaw components |
| 890,848 | Jun. 16, 1908 | E.S. Mummert, J.O. Dixon | Screw Threading Machine | metal threading machines |
| 1,097,096 | May 19, 1914 | H. Hunteman, H.H. Heuerman | Wrench | screw adjust wrenches |
| 2,215,344 | Sep. 17, 1940 | A.P. Albrecht | Micro Dial | drill bits |
| 3,311,003 | Mar. 28, 1967 | J. Daugherty | Facing Head Attachment and Drive Mechanism Therefor | metalworking machine mechanisms |
| 3,599,517 | Aug. 17, 1971 | J. Müller | Boring and facing head for machine tools | boring heads |
| 3,730,636 | May 01, 1973 | S. Mizoguchi | Boring Head | boring heads |
| 4,516,889 | May 14, 1985 | R.M. Ortlieb | Precision adjustable cutting tool | metalworking machine mechanisms |
