| Patents for Hall Mfg. Co. |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| GB-300,746 | Nov. 22, 1928 | H.M. Co. | Improvements in Cylinder Grinders | cylinder maintenance |
| 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 |
| 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 |
| 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 |
| GB-407,186 | Mar. 15, 1934 | H.M. Co. | Improvements in Valve Seat Grinding Tools | valve reseating tools |
| DE-634,784 | Sep. 03, 1936 | H.M. Co. | Suction Device for Removing Cuttings in Cylinder Boring Machines | cylinder maintenance |
| DE-641,899 | Feb. 17, 1937 | H.M. Co. | Valve Seat Grinding Machine With Centering Rod | valve and seat maintenance |
| GB-501,338 | Feb. 22, 1939 | H.M. Co. | Valve Seat Grinding Means | valve reseating tools |
