2178131

Information

• Patent Grant
• 2178131

• References
• Source

• Patent Number

  2,178,131

• Date Filed

  Not available

• Date Issued

  Tuesday, October 31, 1939
  85 years ago

• CPC

  • B23Q35/20 - with special means for varying the ratio of reproduction
  • B44B1/04 - having devices for changing
  • Y10T409/301232 - including pantograph cutter-carrier

• US Classifications

  • 409 - Gear cutting, milling, or planing
  • 033 - Geometrical instruments