1389974

Information

• Patent Grant
• 1389974

• References
• Source

• Patent Number

  1,389,974

• Date Filed

  Not available

• Date Issued

  Tuesday, September 6, 1921
  103 years ago

• CPC

  • B23B31/1605 - Details of the jaws
  • Y10T279/1921 - Annular rack

• US Classifications

  • 279 - Chucks or sockets
  • 451 - Abrading