All Patents of Type: drill grinders |
Patents 1 -
15
of 35
|
Number | Date | Patentee | Title | Type |
201,449 | Mar. 19, 1878 | A.K. Rider | Drill Grinder | drill grinders |
299,433 | May 27, 1884 | A. Coventry, W.F. Smith | Machinery for Grinding or Sharpening Drills | drill grinders |
508,268 | Nov. 07, 1893 | J.S. Bancroft | Machine for Sharpening Drills | drill grinders |
523,897 | Jul. 31, 1894 | J.J. Kenyon | Drill Grinding Machine | drill grinders |
607,306 | Jul. 12, 1898 | O.S. Walker | Twist-drill-grinding machine | drill grinders |
613,127 | Oct. 25, 1898 | W. Eames | Twist Drill Grinder | drill grinders |
614,092 | Nov. 15, 1898 | G.T. Eames | Drill-grinder | drill sharpening machines |
622,212 | Apr. 04, 1899 | R. Dutton | Twist-drill grinder | drill grinders |
643,703 | Feb. 20, 1900 | H.P. White | Drill-grinding machines | drill sharpening machines |
643,927 | Feb. 20, 1900 | O.S. Walker | Drill-grinder | drill sharpening machines |
684,890 | Oct. 22, 1901 | H.P. White | Drill-grinder | drill sharpening machines |
704,348 | Jul. 08, 1902 | J.N. Lapointe | Grinding-machine | drill sharpening machines |
1,253,291 | Jan. 15, 1918 | W.A. Smith | Drill Sharpener | drill grinders |
1,253,292 | Jan. 15, 1918 | W.A. Smith | Dolly Mechanism for Drill Sharpeners | drill grinders |
GB-112,879 | Jan. 31, 1918 | P. Hunt, H.W. Hunt, H. Hunt | New or improved construction of twist drill grooving and clearance grinding (or milling) machines | drill grinders |