| All Patents in class 451/363 |
Patents 16 -
30
of 51
      |
| Number | Date | Patentee | Title | Type |
| 1,324,567 | Dec. 09, 1919 | D.B. Salstrom | Wood-carving machine | carving machines |
| 1,337,139 | Apr. 13, 1920 | G.C. Kimmel | Grinding Machine | internal grinders |
| 1,445,875 | Feb. 20, 1923 | R.W. Ellingham, C.E. Van Norman | Grinding machine | vehicle mechanic |
| 1,522,465 | Jan. 06, 1925 | G.C. Kimmel | Internal Grinding Machine | internal grinders |
| 1,664,024 | Mar. 27, 1928 | J. de Koning | Grinding machine | |
| 1,664,983 | Apr. 03, 1928 | G.C. Kimmel | Automatic Coolant-Arresting Mechanism | grinding machines |
| 1,756,949 | May 06, 1930 | E.S. McGonegal | Portable Grinding Tool | metal lathe accessories and attachments |
| 1,814,365 | Jul. 14, 1931 | C. Booth | Grinding Machinery | grinding machines |
| 1,864,129 | Jun. 21, 1932 | H. Fritschi | Machine Tool Structure | grinding machines |
| 1,897,035 | Feb. 14, 1933 | C.J. Anderson | Grinding machine | sharpening machines |
| 1,909,614 | May 16, 1933 | E.B. Gardner | Rotary grinding machine | |
| 1,924,608 | Aug. 29, 1933 | H.R. Isler | Cutter Grinder | tool grinders |
| 1,965,234 | Jul. 03, 1934 | F.S. Haas | Grinding Machine | grinding machines |
| 1,975,947 | Oct. 09, 1934 | S. Einstein, H.R. Isler | Machine Tool | tool grinders |
| 2,032,589 | Mar. 03, 1936 | E.A. Overstedt | Gear Lapping Machine | gear lapping machines |
