| All Patents in class 76/108.1 |
Patents 1 -
15
of 20
      |
| Number | Date | Patentee | Title | Type |
| 75,182 | Mar. 03, 1868 | J. Mix | Improvement in Manufacturing Gimlets | making drills and augers |
| 222,970 | Dec. 23, 1879 | L. Wenchel | Improvement in wood-molding machines | molders |
| 224,530 | Feb. 17, 1880 | W. Hasenzahl | Boring Tool for Stone Working | stoneworking |
| 315,530 | Apr. 14, 1885 | S. Moore | Manufacture of Drills | making drills and augers |
| 492,733 | Feb. 28, 1893 | H. Meister | Chuck and Drill | drill press chucks |
| 574,980 | Jan. 12, 1897 | C. Bornet | Bit or Drill for Borers, &c., and Manufacture of Same | stone boring and drilling machines |
| 1,379,994 | May 31, 1921 | J.J. Kunzer | Method of Making Drills or the Like | making drills and augers |
| 1,379,995 | May 31, 1921 | J.J. Kunzer | Method of Making Drills or the Like | making drills and augers |
| 1,458,802 | Jun. 12, 1923 | G.W. Bufford | Tool Holder and Tool | |
| 1,536,736 | May 05, 1925 | A.W. Erdman, P.F. Vokal | Process of Making Milling Cutters | milling machine cutters |
| 2,148,805 | Feb. 28, 1939 | S.A. Cogsdill | Method of Making Oil Hole Drills | metalworking twist drills |
| 2,206,292 | Jul. 02, 1940 | B.F. Rosenberg | Method of Making a Drill Sleeve | drilling and boring tool holders |
| 2,358,304 | Sep. 19, 1944 | S.A. Cogsdill | Method of Making Oil Hole Twist Drills | metalworking twist drills |
| 2,575,332 | Nov. 20, 1951 | H.D. Cummins | Drill | drill bits |
| 2,693,725 | Nov. 09, 1954 | H.D. Cummins | Method of Making Cutting Tools | |
