| All Patents in class 451/430 |
Patents 1 -
10
of 21
      |
| Picture | Number | Date | Patentee | Title |
| | 379,351 | Mar. 13, 1888 | C.P. Weiss | Device for Reseating Valves |
| | 581,571 | Apr. 27, 1897 | R.H. Benton | Valve Reseating Machine |
| | 980,019 | Dec. 27, 1910 | T.B. Williams, F.L. Smith | Valve-disk-cutting machine |
| | 1,113,674 | Oct. 13, 1914 | H. Moore | Valve Reseater |
 | 1,132,396 | Mar. 16, 1915 | J.W. Brooks, C.I. Sedlmayer | Adjustable Valve Reseating or Milling Tool |
 | 1,170,045 | Feb. 01, 1916 | A.A. Bull | Tool For Truing, Cleansing, and Grinding Valves and Valve Seats |
| | 1,227,499 | May 22, 1917 | T.B. Williams, F.L. Smith | Facing-tool for dressing valve-seats, &c. |
| | 1,227,511 | May 22, 1917 | T.B. Williams, F.L. Smith | Facing-tool for dressing valve-seats, &c. |
| | 1,227,513 | May 22, 1917 | T.B. Williams, F.L. Smith | Facing-tool for dressing valve-seats, &c. |
| | 1,227,515 | May 22, 1917 | T.B. Williams, F.A. Dexter, F.L. Smith | Facing-tool for dressing valve-seats, &c. |
