2257989

Information

• Patent Grant
• 2257989

• References
• Source

• Patent Number

  2,257,989

• Date Filed

  Not available

• Date Issued

  Tuesday, October 7, 1941
  83 years ago

• CPC

  • B23F7/00 - Making herringbone gear teeth
  • B23F19/04 - Lapping spur gears by making use of a correspondingly shaped counterpart
  • B23F23/06 - Chucking arrangements
  • Y10T82/2564 - Tailstock

• US Classifications

  • 451 - Abrading
  • 082 - Turning