| All Patents in class 451/117 |
Patents 16 -
30
of 64
      |
| Number | Date | Patentee | Title | Type |
| 1,015,902 | Jan. 30, 1912 | N.E. Meredith | Valve Grinder | valve grinding tools |
| 1,017,242 | Feb. 13, 1912 | A.B. Browne | Combined Breast Drill and Valve Grinder | combination tools |
| RE13,421 | May 21, 1912 | R.H. Hazeltine | Machine for Reseating Valves | valve grinding tools |
| 1,065,749 | Jun. 24, 1913 | J.H. Wall | Device For Manipulating Explosive Engine Valves | valve grinding tools |
| 1,097,096 | May 19, 1914 | H. Hunteman, H.H. Heuerman | Wrench | screw adjust wrenches |
| 1,102,581 | Jul. 07, 1914 | O.D. Hapgood | Valve Grinder | valve grinding tools |
| 1,104,210 | Jul. 21, 1914 | N.E. Meredith | Valve grinder | |
| 1,104,863 | Jul. 28, 1914 | C.L. Baldwin | Grinding-tool for gas-engine valves | |
| 1,131,789 | Mar. 16, 1915 | W.H. Pearce | Valve-grinding tool | |
| 1,134,511 | Apr. 06, 1915 | G.K. Carlson | Valve-grinder | |
| 1,135,677 | Apr. 13, 1915 | J. Fekete | Valve Grinder | valve grinding tools |
| 1,155,489 | Oct. 05, 1915 | C.F. Hess | Valve Grinder | valve grinding tools |
| 1,161,070 | Nov. 23, 1915 | H.M. Neer | Valve Grinder | valve grinding tools |
| 1,174,572 | Mar. 07, 1916 | F.C. Hersee | Valve Grinder | valve grinding tools |
| 1,206,164 | Nov. 28, 1916 | J.M. Stryhal | Valve Grinding Tool | valve grinding tools |
