| Patents for Thompson Grinder Co. |
Patents 1 -
15
of 90
      |
| Number | Date | Patentee | Title | Type |
| 1,978,181 | Oct. 23, 1934 | J.R. Whittles | Hydraulically driven surface grinding machine | surface grinders |
| 2,068,529 | Jan. 19, 1937 | W.G. Baldenhofer | Grinding Machine | metalworking machine mechanisms |
| 2,113,287 | Apr. 05, 1938 | W.G. Baldenhofer | Machine for Grinding and Sharpening Broaches | broach sharpening machines |
| 2,131,151 | Sep. 27, 1938 | H.F. Smith | Grinding machines | surface grinders |
| 2,138,811 | Dec. 06, 1938 | P.A. Abe | Surface Hardening Lathe Bed | flame hardening machines |
| 2,154,947 | Apr. 18, 1939 | H.H. Beeny, A.H. Lloyd | Hardening Metal Surfaces | flame hardening machines |
| 2,157,948 | May 09, 1939 | H.H. Beeny | Hardening of Metal Surfaces | flame hardening machines |
| 2,216,308 | Oct. 01, 1940 | E.C. Ballman | Method and Means for Balancing Grinding Wheels | wheel truing devices |
| 2,216,800 | Oct. 08, 1940 | W.G. Baldenhofer | Hydraulic Control Device | hydraulic apparatus |
| 2,231,233 | Feb. 11, 1941 | H. Vienhaus | Process of finishing materials | metalworking machines |
| 2,252,877 | Aug. 19, 1941 | C. Baldenhofer | Way Grinding Machine | surface grinders |
| 2,294,492 | Sep. 01, 1942 | J.C. Wilson | Dresser Attachment for Grinding Machines | grinder dressers |
| 2,294,493 | Sep. 01, 1942 | J.C. Wilson | Apparatus for Wheel Dressing | grinder dressers |
| 2,294,494 | Sep. 01, 1942 | J.C. Wilson | Grinding Wheel Dresser | grinder dressers |
| 2,315,104 | Mar. 30, 1943 | W.G. Baldenhofer | Inclinable grinder spindle | surface grinders |
