| All Patents in class 451/397 |
Patents 16 -
30
of 31
      |
| Number | Date | Patentee | Title | Type |
| 2,447,334 | Aug. 17, 1948 | F.P. Healy | Crankshaft regrinding chuck | crankshaft grinders |
| 2,449,831 | Sep. 21, 1948 | M.H. Arms, L.J. Barnard | Chuck | grinders |
| 2,478,607 | Aug. 09, 1949 | L.E. Mehlhope, F.J. Theler | Grinding Machine | cylindrical grinders |
| 2,526,844 | Oct. 24, 1950 | H.P. Boggis | Tap grinding machine | cutter grinding machines |
| 2,635,395 | Apr. 21, 1953 | P.A. Grobey, M.H. Arms | Machine for grinding internal surfaces concentric with external surfaces | grinders |
| 2,681,533 | Jun. 22, 1954 | F.C. Logeman | Grinding Machine Headstock | cylindrical grinders |
| 2,706,369 | Apr. 19, 1955 | E.L. Dix | Centerless grinding machine with loading and unloading mechanism | grinders |
| 2,731,774 | Jan. 24, 1956 | E.J. Sieber, Jr., W.L. Davis | Centerless Grinding Machine with Work Rotating and Feeding Support | centerless grinders |
| 2,737,760 | Mar. 13, 1956 | F.P. Healy | Machine tool apparatus | crankshaft grinders |
| 2,754,641 | Jul. 17, 1956 | E.C. Bidwell | Work holding and clamping mechanism for centerless grinding machines | grinders |
| 2,793,479 | May 28, 1957 | P.C. Durland, M.H. Arms | Internal grinding machine | grinders |
| 2,976,650 | Mar. 28, 1961 | B.H. Steinhard | Machine Tool Workpiece Loading System | centerless grinders |
| 3,130,526 | Apr. 28, 1964 | J. Decker | Mechanism for Securing Movable Machine Tool Members | cylindrical grinders |
| 3,209,494 | Oct. 05, 1965 | W.B. Seidel | Method and Apparatus for Grinding Annular Workpieces | cylindrical grinders |
| 3,479,775 | Nov. 25, 1969 | J.K. Smith | Work Handling Fixture | grinding attachments |
