| All Patents in class 82/172 |
Patents 1 -
15
of 24
      |
| Number | Date | Patentee | Title | Type |
| 49,203 | Aug. 01, 1865 | S. Wing | Water and Gas Fillings | valve reseating tools |
| 144,524 | Nov. 11, 1873 | H. Essex | Machines for Dressing Metal Cocks | metal lathes |
| 146,633 | Jan. 20, 1874 | W.W. Allmand | Machines for Refitting Valves | valve reseating tools |
| 464,617 | Dec. 08, 1891 | P.J. Wright, C.H. Sampson | Valve Dressing Machine | valve reseating machines |
| 560,481 | May 19, 1896 | F.E. Dexter | Machine for repairing valves and valve-seats | valve reseating machines |
| 663,000 | Dec. 04, 1900 | M.A. Ackles | Valve Repairing Machine | valve reseating machines |
| 836,487 | Nov. 20, 1906 | F.G. Crone | Valve Dresser | valve grinding tools |
| 918,805 | Apr. 20, 1909 | T.B. Williams | Machine for reseating valves, &c. | automotive tools |
| 926,957 | Jul. 06, 1909 | A.S. Noonan | Valve Truing Tool | valve grinding tools |
| 956,918 | May 03, 1910 | T.B. Williams | Valve-reseating tool | automotive tools |
| 980,019 | Dec. 27, 1910 | F.L. Smith, T.B. Williams | Valve-disk-cutting machine | |
| 1,087,625 | Feb. 17, 1914 | F.O. Albertson | Valve Truing Tool | valve grinding tools |
| 1,115,071 | Oct. 27, 1914 | N.B. Healy | Valve Dressing Tool | valve grinding tools |
| 1,132,396 | Mar. 16, 1915 | J.W. Brooks, C.I. Sedlmayer | Adjustable Valve Reseating or Milling Tool | valve grinding tools |
| 1,170,045 | Feb. 01, 1916 | A.A. Bull | Tool For Truing, Cleansing, and Grinding Valves and Valve Seats | valve grinding tools |
