| All Patents in class 451/430 |
Patents 1 -
15
of 21
      |
| Number | Date | Patentee | Title | Type |
| 379,351 | Mar. 13, 1888 | C.P. Weiss | Device for Reseating Valves | valve reseating tools |
| 581,571 | Apr. 27, 1897 | R.H. Benton | Valve Reseating Machine | valve reseating machines |
| 980,019 | Dec. 27, 1910 | F.L. Smith, T.B. Williams | Valve-disk-cutting machine | |
| 1,113,674 | Oct. 13, 1914 | H. Moore | Valve Reseater | valve reseating machines |
| 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 |
| 1,227,499 | May 22, 1917 | T.B. Williams, F.L. Smith | Facing-tool for dressing valve-seats, &c. | automotive tools |
| 1,227,511 | May 22, 1917 | T.B. Williams, F.L. Smith | Facing-tool for dressing valve-seats, &c. | automotive tools |
| 1,227,513 | May 22, 1917 | T.B. Williams, F.L. Smith | Facing-tool for dressing valve-seats, &c. | automotive tools |
| 1,227,515 | May 22, 1917 | T.B. Williams, F.A. Dexter, F.L. Smith | Facing-tool for dressing valve-seats, &c. | automotive tools |
| 1,236,408 | Aug. 14, 1917 | E.J. Dickson | Valve Reamer and Refacer | valve grinding tools |
| 1,340,359 | May 18, 1920 | F.O. Albertson | Valve-seat reamer | reamers |
| 1,517,176 | Nov. 25, 1924 | H.M. Shepherd | Device for truing valves | valve and seat maintenance |
| 1,603,478 | Oct. 19, 1926 | R.E. Lees | Valve resurfacing mechanism | handheld power tools |
| 1,749,514 | Mar. 04, 1930 | J.Y. Scott | Valve-reseating apparatus | valve and seat maintenance |
