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