575393

Information

• Patent Grant
• 575393

• References
• Source

• Patent Number

  575,393

• Date Filed

  Not available

• Date Issued

  Tuesday, January 19, 1897
  128 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