| All Patents in class 279/43.5 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 25,984 | Nov. 01, 1859 | N. Spofford | Bit-stock with clam-style chuck | brace chucks |
| RE2,576 | Apr. 23, 1867 | N. Spofford | Improvement in braces for bits | brace chucks |
| 78,157 | May 19, 1868 | I.C. Tate | Improvement in braces for bits | brace chucks |
| RE8,215 | May 07, 1878 | N. Spofford | Improvement in braces for bits | brace chucks |
| 225,768 | Mar. 23, 1880 | N. Spofford | Bit-brace | brace chucks |
| 600,747 | Mar. 15, 1898 | J.K. Severson | Adjustable Tool Holder | lathe tool holders and tool posts |
| 790,479 | May 23, 1905 | W. Carr, J. Carr | Boring-tool holder | lathe tool holders and tool posts |
