517680

Information

• Patent Grant
• 517680

• References
• Source

• Patent Number

  517,680

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1894
  131 years ago

• CPC

  • B44B3/003 - using a pendulum
  • Y10T409/301568 - by use of pivotally supported tracer

• US Classifications

  • 409 - Gear cutting, milling, or planing