| All Patents in class 279/56 |
Patents 16 -
30
of 86
      |
| Number | Date | Patentee | Title | Type |
| RE6,212 | Jan. 05, 1875 | C.B. Rose | Improvement in bit-stocks | braces |
| 171,255 | Dec. 21, 1875 | J.W. Anthoine | Improvement in angular bit-stocks | hand drills |
| 176,462 | Apr. 25, 1876 | J.P. Curtiss | Improvement in Awl-Hafts | tool holders |
| 194,109 | Aug. 14, 1877 | H.L. Pratt | Improvement in Drill-Chucks | drill chucks |
| RE8,115 | Mar. 12, 1878 | H.S. Bartholomew | Improvement in Bit-Stocks | brace chucks |
| 210,075 | Nov. 19, 1878 | C.H. Amidon | Improvement in bit-braces | brace chucks |
| 219,574 | Sep. 16, 1879 | J.S. Fray | Bit-brace | braces |
| 226,646 | Apr. 20, 1880 | C.H. Amidon | Bit-brace | braces |
| 262,771 | Aug. 15, 1882 | J.H. Hoague | Drill-chuck | drill chucks |
| 281,568 | Jul. 17, 1883 | C. Schoch | Extension-Shank for Bits | drill bit extensions |
| 286,388 | Oct. 09, 1883 | W.R. Clarkson | Ratchet bit-brace | ratchet braces |
| 303,887 | Aug. 19, 1884 | J.B. Sargent | Tool-handle | tool holders |
| 309,276 | Dec. 16, 1884 | H. Wilson | Bit holder | |
| 337,242 | Mar. 02, 1886 | J. Chantrell | Tool-Handle | tool holders |
| 339,595 | Apr. 06, 1886 | C.E. Stone | Drill Chuck | drill chucks |
