| All Patents in class 451/396 |
Patents 1 -
15
of 15
      |
| Number | Date | Patentee | Title | Type |
| 490,471 | Jan. 24, 1893 | G. Carlyle | Machine for Forming Pearl Buttons | button making machinery |
| 667,579 | Feb. 05, 1901 | A. Roemisch | Apparatus for Grinding and Smoothing Glass | |
| 1,666,500 | Apr. 17, 1928 | N.I. Lundberg | Metal Working Tool | grinders |
| 1,991,958 | Feb. 19, 1935 | M. Romaine | Grinding Machine | grinding machines |
| 2,136,491 | Nov. 15, 1938 | E.S. Cornell | Metalworking Machine | surface grinders |
| 2,314,312 | Mar. 16, 1943 | W.C. Knapp | Grinding method and apparatus | |
| 2,400,826 | May 21, 1946 | H.S. Jakobsen | Universal Grinder Head | grinding machines |
| 2,413,436 | Dec. 31, 1946 | O.W. Dawson | Grinding Machine | tool grinders |
| 2,436,588 | Feb. 24, 1948 | J. Martin | Cam Grinding Machine | grinding machines |
| 2,449,459 | Sep. 14, 1948 | T. Eckert | Perforator Grinding Fixture | grinding attachments |
| 2,691,255 | Oct. 12, 1954 | J.Y. Blazek | Brake shoe and lining grinder | brake maintenance |
| 2,752,740 | Jul. 03, 1956 | G.H. Mouw | Form relieving fixture | sharpening tools and fixtures |
| 2,764,855 | Oct. 02, 1956 | O.W. Dawson | Fixture for positioning tool relative to grinding head | cutter grinding machines |
| 3,013,457 | Dec. 19, 1961 | G.E. Ruehrwein, R.E. Le Blond | Crankshaft Lathe and Method of Operation | crankshaft lathes |
| 3,081,585 | Mar. 19, 1963 | H.P. Boggis | Relieving fixture for grinding machines | cutter grinding machines |
