| Patents for Hall Manufacturing Co. |
Patents 16 -
30
of 57
      |
| Number | Date | Patentee | Title | Type |
| 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 |
| FR-734,156 | Oct. 17, 1932 | H.M. Co. | Valve Seat Grinding Device | valve and seat maintenance |
| FR-734,157 | Oct. 17, 1932 | H.M. Co. | Cylinder Boring Tool | cylinder maintenance |
| 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 |
| GB-389,274 | Mar. 16, 1933 | H.M. Co. | Cylinder Reamer | cylinder maintenance |
| GB-390,622 | Apr. 13, 1933 | H.M. Co. | Improvements in or Relating to Cylinder Honing Devices | cylinder maintenance |
| 1,906,263 | May 02, 1933 | E.A. Hall | Valve Seat Grinder | valve reseating tools |
| 1,909,347 | May 16, 1933 | E.A. Hall | Cylinder Working Tool | reamers |
| 1,918,642 | Jul. 18, 1933 | E.A. Hall | Cylinder Reamer | reamers |
| 1,922,202 | Aug. 15, 1933 | W.E. Heuer, E.A. Hall | Cylinder Working Tool | honing tools |
| FR-751,729 | Sep. 08, 1933 | H.M. Co. | Valve Seat Grinding Tool | valve and seat maintenance |
| GB-398,245 | Sep. 11, 1933 | H.M. Co. | Valve Seat Grinder | valve reseating tools |
