| All Patents in class 451/150 |
Patents 16 -
23
of 23
      |
| Number | Date | Patentee | Title | Type |
| 1,957,485 | May 08, 1934 | H.W. Zimmerman | Cylinder grinding tool adjusting mechanism | automotive tools |
| 2,002,971 | May 28, 1935 | H.W. Zimmerman | Reamer sharpener | reamers |
| 2,163,604 | Jun. 27, 1939 | A.M. Johnson | Honing machine | honing machines |
| 2,787,865 | Apr. 09, 1957 | M.J. Gross | Honing machine and sizing mechanism therefor | honing machines |
| 2,787,866 | Apr. 09, 1957 | M.J. Gross | Plug type gage for honing machines | honing machines |
| 3,237,350 | Mar. 01, 1966 | M.R. Estabrook | Automatic honing method | honing machines |
| 3,410,028 | Nov. 12, 1968 | M.R. Estabrook | Control of automatic abrading machines | |
| 4,528,776 | Jul. 16, 1985 | M.R. Estabrook | Honing machine with stonewear compensator | honing machines |
