305233

Information

• Patent Grant
• 305233

• References
• Source

• Patent Number

  305,233

• Date Filed

  Not available

• Date Issued

  Tuesday, September 16, 1884
  140 years ago

• CPC

  • B23F5/22 - the tool being a hob for making spur gears
  • Y10T409/102544 - including infeed means

• US Classifications

  • 409 - Gear cutting, milling, or planing