All Patents of Type: countersinks |
Patents 1 -
15
of 77
|
Number | Date | Patentee | Title | Type |
9,705 | May 10, 1853 | A.G. Bachelder | Countersink | countersinks |
41,894 | Mar. 08, 1864 | H.S. Shepardson | Improvement in Countersinks | countersinks |
50,328 | Oct. 10, 1865 | W.G. Bonwill | Improvement in Screw-Drivers | screwdriver blades |
52,174 | Jan. 23, 1866 | A. Parsons, C.F. Kimball | Improvement in Bits for Boring Holes | countersinks |
55,144 | May 29, 1866 | H.T. Moody | Countersink for Bolts | countersinks |
60,207 | Dec. 04, 1866 | H.C. Lewis | Improved Countersink Bit | countersinks |
62,849 | Mar. 12, 1867 | T. Hofstatter | Improvement in Augers | countersinks |
63,392 | Apr. 02, 1867 | M. Jincks | Improvement in Boring Bits | countersinks |
74,490 | Feb. 18, 1868 | J.A. Bidwell | Screwdriver and Countersink | screwdriver blades |
77,819 | May 12, 1868 | C. Krebs | Improvement in countersinks | countersinks |
83,348 | Oct. 20, 1868 | P.A. Whitney | Improvement in counter-sink | countersinks |
86,674 | Feb. 09, 1869 | L.H. Hunt | Improvement in Countersink | countersinks |
89,097 | Apr. 20, 1869 | C. Wardwell | Improvement in Augers | auger bits |
92,261 | Jul. 06, 1869 | R.P. Buttles | Improvement in Countersink | countersinks |
93,807 | Aug. 17, 1869 | W.A. Clark | Improvement in Countersink and Bit | countersinks |