| All Patents in class 451/117 |
Patents 1 -
15
of 64
      |
| Number | Date | Patentee | Title | Type |
| 286,095 | Oct. 02, 1883 | J.D. Waldran | Valve Grinder | valve grinding tools |
| 571,572 | Nov. 17, 1896 | S.H. Lea | Tool for Reseating Faucets | valve reseating tools |
| 918,049 | Apr. 13, 1909 | R.H. Hazeltine | Machine for Reseating Valves | valve grinding tools |
| 918,050 | Apr. 13, 1909 | R.H. Hazeltine | Valve Grinding Device | valve grinding tools |
| 930,472 | Aug. 10, 1909 | F.I. Harding | Valve Grinder | valve grinding tools |
| 930,620 | Aug. 10, 1909 | J.R. Sandberg | Combined breast-drill and valve-grinder | breast drills |
| 942,222 | Dec. 07, 1909 | I.C. Smith | Valve Grinder | valve grinding tools |
| 949,057 | Feb. 15, 1910 | H.W. Brown, G.H. Brown | Valve Reseating Device | valve grinding tools |
| 956,822 | May 03, 1910 | M.F. Parsons | Grinding Tool | valve grinding tools |
| 959,653 | May 31, 1910 | E.E. Townsend | Valve-seat grinder | vehicle mechanic |
| 963,986 | Jul. 12, 1910 | F.C. Blanchard | Combination drill and valve-grinder | eggbeater drills |
| 977,258 | Nov. 29, 1910 | O.R. Angell | Combined valve grinder and drill | eggbeater drills |
| 995,002 | Jun. 13, 1911 | C.A. Herle | Valve Grinding Tool | valve grinding tools |
| 996,435 | Jun. 27, 1911 | E.E. Townsend | Valve-grinder | vehicle mechanic |
| 1,005,864 | Oct. 17, 1911 | W.L. Milner | Valve Grinding Apparatus | valve grinding tools |
