1396861

Information

• Patent Grant
• 1396861

• References
• Source

• Patent Number

  1,396,861

• Date Filed

  Not available

• Date Issued

  Tuesday, November 15, 1921
  103 years ago

• CPC

  • B24B15/08 - for grinding co-operating seat surfaces by moving one over the other
  • Y10S81/02 - Spiral drive for wrenches

• US Classifications

  • 451 - Abrading
  • 081 - Tools