394980

Information

• Patent Grant
• 394980

• References
• Source

• Patent Number

  394,980

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1888
  136 years ago

• CPC

  • B24B33/02 - designed for working internal surfaces of revolution
  • Y10S451/906 - Machine element or unit

• US Classifications

  • 451 - Abrading