2139290

Information

• Patent Grant
• 2139290

• References
• Source

• Patent Number

  2,139,290

• Date Filed

  Not available

• Date Issued

  Tuesday, December 6, 1938
  86 years ago

• CPC

  • B23F23/1293 - Workpiece heads
  • B23F19/04 - Lapping spur gears by making use of a correspondingly shaped counterpart
  • Y10T409/10636 - On reciprocating carriage

• US Classifications

  • 451 - Abrading
  • 409 - Gear cutting, milling, or planing