All Patents of Type: wood drill bits |
Patents 1 -
8
of 8
|
Number | Date | Patentee | Title | Type |
CA-669 | Oct. 22, 1870 | J. Leyden | Improvements in expansion drills | drill bits |
567,977 | Sep. 22, 1896 | T.F. Hagerty | Center Bit | wood drill bits |
654,861 | Jul. 31, 1900 | J.J. Tynan | Boring Tool | wood drill bits |
845,360 | Feb. 26, 1907 | M. Jungling | Recess-boring tool | wood drill bits |
2,681,673 | Jun. 22, 1954 | B.A. Mackey | Drill bit | wood drill bits |
2,752,965 | Jul. 03, 1956 | B.A. Mackey | Drill bit construction | wood drill bits |
2,794,468 | Jun. 04, 1957 | R.W. Huxtable | Woodcutting bit assembly | wood drill bits |
4,527,449 | Jul. 09, 1985 | W.E. Sydlowski, H.A. Trent | Boring bit and method for manufacture thereof | wood drill bits |