| Patents for Ernest A. Hall |
Patents 1 -
15
of 35
      |
| Number | Date | Patentee | Title | Type |
| 1,692,439 | Nov. 20, 1928 | E.A. Hall | Grinding Tool | |
| 1,694,705 | Dec. 11, 1928 | E.A. Hall | Valve Hone | honing tools |
| 1,695,548 | Dec. 18, 1928 | E.A. Hall, G.E. Burns | Gas Burner | |
| CA-285,926 | Dec. 25, 1928 | G.J. Lindroth, E.A. Hall | Cylinder Hone | honing tools |
| 1,696,477 | Dec. 25, 1928 | G.J. Lindroth, E.A. Hall | Cylinder Hone | honing tools |
| CA-290,588 | Jun. 18, 1929 | E.A. Hall | Cylinder Hone | honing tools |
| 1,723,160 | Aug. 06, 1929 | E.A. Hall | Supporting Standard for Cylinder Hones | honing tools |
| 1,748,126 | Feb. 25, 1930 | E.A. Hall | Pilot Stem | valve grinding tools |
| 1,760,493 | May 27, 1930 | E.A. Hall | Portable Grinding Tool | valve grinding tools |
| 1,796,842 | Mar. 17, 1931 | E.A. Hall | Cylinder Hone | honing tools |
| 1,831,172 | Nov. 10, 1931 | E.A. Hall | Cylinder Hone | honing tools |
| CA-329,840 | Jan. 31, 1933 | E.A. Hall | Cylinder Reamer | cylinder maintenance |
| CA-330,018 | Feb. 07, 1933 | E.A. Hall | Cylinder Working Tool | honing tools |
| CA-330,019 | Feb. 07, 1933 | E.A. Hall | Valve Seat Grinder | valve reseating tools |
| 1,906,263 | May 02, 1933 | E.A. Hall | Valve Seat Grinder | valve reseating tools |
