| All Patents in class 451/135 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 879,277 | Feb. 18, 1908 | A.B. Landis | Grinding-machine | grinders |
| 1,252,162 | Jan. 01, 1918 | E. Bahnik, J. Pauer | Grinding Machine | |
| 1,263,559 | Apr. 23, 1918 | H. Kaetker | Cylinder Grinder | |
| 1,269,506 | Jun. 11, 1918 | E. Preston | Grinder | |
| 1,476,385 | Dec. 04, 1923 | A. White | Indicator | |
| 1,577,478 | Mar. 23, 1926 | L.C. Marburg | Cylinder-grinding attachment | cylindrical grinders |
| 1,624,211 | Apr. 12, 1927 | W.L. Bryant | Multispindle internal-combustion machine | cylindrical grinders |
| 1,717,899 | Jun. 18, 1929 | G.D. Sundstrand | Grinding Machine | internal grinders |
| 2,039,349 | May 05, 1936 | E.G. Roehm, M. Romaine | Planetary Milling Machine | milling machines |
| 2,405,748 | Aug. 13, 1946 | W. Johnson | Internal Grinder | grinding machines |
| 2,559,180 | Jul. 03, 1951 | F.C. Victory | Jig Grinder | jig grinders |
| 3,022,608 | Feb. 27, 1962 | C. Tree | Taper Grinding Tool | milling machine tools |
| 3,037,329 | Jun. 05, 1962 | E.L. Ritter, H. Ernst, W.A. Haggerty | Method and Apparatus for Grinding Drills | drill sharpening machines |
