All Patents in class 74/423 |
Patents 1 -
10
of 14
      |
Picture | Number | Date | Patentee | Title |
| 6,943X | Feb. 27, 1832 | J.H. Corey | Portable Horse Power |
 | 31,595 | Mar. 05, 1861 | J. Griffin | Mode of Regulating the Speed of Vehicles Moved by Mechanical Power |
 | 138,166 | Apr. 22, 1873 | J. King | Improvement in grain-drills |
 | 191,815 | Jun. 12, 1877 | D. Powers | Bit-stock with gear-train multiplier |
| 305,054 | Sep. 16, 1884 | E.B. Dake, W.F. Dake | Bit-brace (geared) |
 | 321,196 | Jun. 30, 1885 | U. Eberhardt, H.E. Eberhardt | Drilling-Machine |
| 461,622 | Oct. 20, 1891 | E.W. Ross | Carrier attachment for feed-cutters |
 | 797,101 | Aug. 15, 1905 | W.W. Dingee | Portable Horse Power |
 | 930,620 | Aug. 10, 1909 | J.R. Sandberg | Combined breast-drill and valve-grinder |
 | 1,017,242 | Feb. 13, 1912 | A.B. Browne | Combined Breast Drill and Valve Grinder |