| Patents for William A. Clark |
Patents 1 -
15
of 21
      |
| Number | Date | Patentee | Title | Type |
| 19,142 | Jan. 19, 1858 | W.A. Clark, J.D. Heaton | Corn Husker | corn huskers |
| 20,192 | May 11, 1858 | W.A. Clark | Method of seating the movable cutter in expansive bits | adjustable drill bits |
| 21,597 | Sep. 28, 1858 | W.A. Clark | Expansive bit | adjustable drill bits |
| 24,722 | Jul. 12, 1859 | W.A. Clark | Improved device for fastening cutters of hollow augers | hollow bits |
| 28,653 | Jun. 12, 1860 | W.A. Clark | Adjustable hollow auger | hollow bits |
| 34,944 | Apr. 15, 1862 | W.A. Clark | Improvement in bullet-molds | |
| 86,364 | Feb. 02, 1869 | W.A. Clark | Improvement in Hollow Augers | hollow bits |
| RE3,516 | Jun. 22, 1869 | W.A. Clark | Improvement in expansive bits | adjustable drill bits |
| 93,807 | Aug. 17, 1869 | W.A. Clark | Improvement in Countersink and Bit | countersinks |
| 93,808 | Aug. 17, 1869 | W.A. Clark | Improvement in Hollow Auger | hollow bits |
| 94,870 | Sep. 14, 1869 | W.A. Clark | Improved Washer-Cutter | washer cutters |
| RE3,733 | Nov. 16, 1869 | W.A. Clark | Improvement in expansive bits | adjustable drill bits |
| RE4,668 | Dec. 12, 1871 | W.A. Clark | Improvement in expansive bits | adjustable drill bits |
| 121,707 | Dec. 12, 1871 | W.A. Clark | Improvement in Hollow Augers | hollow bits |
| RE5,393 | May 06, 1873 | W.A. Clark | Improvement in Hollow-Augers | hollow bits |
