| Patents for John F. Kopczynski |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 2,814,206 | Nov. 26, 1957 | J.F. Kopczynski | Ultra high speed bearings | metalworking machine bearings |
| 2,850,338 | Sep. 02, 1958 | J.F. Kopczynski | High speed bearing | metalworking machine bearings |
| 3,122,932 | Mar. 03, 1964 | J.F. Kopczynski | Machine tool | grinding attachments |
| 3,625,263 | Dec. 07, 1971 | J.F. Kopczynski | Roll bending machine and method | |
| 3,672,411 | Jun. 27, 1972 | J.F. Kopczynski | Straightening machine for elongated workpieces | |
| 3,783,910 | Jan. 08, 1974 | J.F. Kopczynski | Bending machine for straightening elongated workpieces | |
| 3,799,216 | Mar. 26, 1974 | J.F. Kopczynski | Straightening machine for elongated workpieces | |
