| Patents for Hall Mfg. Co. |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
| | GB-300,746 | Nov. 22, 1928 | H.M. Co. | Improvements in Cylinder Grinders |
| | FR-734,156 | Oct. 17, 1932 | H.M. Co. | Valve Seat Grinding Device |
| | FR-734,157 | Oct. 17, 1932 | H.M. Co. | Cylinder Boring Tool |
| | GB-389,274 | Mar. 16, 1933 | H.M. Co. | Cylinder Reamer |
| | GB-390,622 | Apr. 13, 1933 | H.M. Co. | Improvements in or Relating to Cylinder Honing Devices |
| | FR-751,729 | Sep. 08, 1933 | H.M. Co. | Valve Seat Grinding Tool |
| | GB-398,245 | Sep. 11, 1933 | H.M. Co. | Valve Seat Grinder |
| | GB-407,186 | Mar. 15, 1934 | H.M. Co. | Improvements in Valve Seat Grinding Tools |
| | DE-634,784 | Sep. 03, 1936 | H.M. Co. | Suction Device for Removing Cuttings in Cylinder Boring Machines |
| | DE-641,899 | Feb. 17, 1937 | H.M. Co. | Valve Seat Grinding Machine With Centering Rod |
