| All Patents in class 451/219 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 621,519 | Mar. 21, 1899 | W.G. Burnham | Gear-cutting machine | gear making machines |
| 957,935 | May 17, 1910 | C.M. Conradson | Grinding Machine Feeding Mechanism | grinding machines |
| 1,612,830 | Jan. 04, 1927 | C.G. Olson | Grinding machine | gear hobbing machines |
| 1,698,953 | Jan. 15, 1929 | L.W. Moulton, O.C. Kavle | Gear-Finishing Machine | gear making machines |
| 2,111,045 | Mar. 15, 1938 | R.S. Drummond | Lapping machine | gear making machines |
| 2,456,410 | Dec. 14, 1948 | S.G. Brady, I.J. Gruenberg | Gear Grinding Machine | gear grinding machines |
| 2,520,879 | Aug. 29, 1950 | A.H. Dall | Lubricating System | cylindrical grinders |
| 2,560,967 | Jul. 17, 1951 | F. Lohutko | Apparatus for Grinding Gears and Gear Cutters | grinding attachments |
| 2,595,591 | May 06, 1952 | F. Lohutko | Apparatus for Grinding Helical Gears | gear making machines |
| 2,607,175 | Aug. 19, 1952 | J.J. Osplack | Method of making precision gears | gear hobbing machines |
| 2,641,876 | Jun. 16, 1953 | B.A. Kearns, J. Decker | Precision Grinding Machine | cylindrical grinders |
| 3,367,069 | Feb. 06, 1968 | G. Mickas | Form Wheel Gear Grinder | gear grinding machines |
