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| Patents for Thomas P. How | |||||
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| Picture | Number | Date | Patentee | Title | |
 | RE295 | Jan. 30, 1855 | C. Monnin, W.M. Booth | Improvement in fastening lanterns | |
 | 13,273 | Jul. 17, 1855 | O. Palmer | Rotary wrecking-pump | |
 | 20,192 | May 11, 1858 | W.A. Clark | Method of seating the movable cutter in expansive bits | |
 | 45,455 | Dec. 13, 1864 | G. Rowden, C.W. Dickinson | Improved Engine Turning Lathe | |
 | 84,698 | Dec. 08, 1868 | A. Judson | Improved lathe-chuck | |
 | 127,438 | Jun. 04, 1872 | A.P. Stephens | Improvement in the manufacture of cement pipes | |