| Patents for Darius Parkhurst |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 69,122 | Sep. 24, 1867 | D. Parkhurst | Improvement in sawmill head-blocks | sawmill headblocks |
| 91,767 | Jun. 22, 1869 | D. Parkhurst | Improvement in head-block for sawmills | sawmill headblocks |
| 123,507 | Feb. 06, 1872 | D. Parkhurst | Improvement in head-blocks | sawmill headblocks |
| 257,060 | Apr. 25, 1882 | D. Parkhurst | Head-block for saw-mills | sawmill headblocks |
| 274,366 | Mar. 20, 1883 | D. Parkhurst | Head-block | sawmill headblocks |
| 296,999 | Apr. 15, 1884 | D. Parkhurst | Head-block for saw-mills | sawmill headblocks |
| 321,134 | Jun. 30, 1885 | D. Parkhurst | Saw-guide | circular saws |
