1379853

Information

• Patent Grant
• 1379853

• References
• Source

• Patent Number

  1,379,853

• Date Filed

  Not available

• Date Issued

  Tuesday, May 31, 1921
  103 years ago

• CPC

  • B24B3/242 - of step drills

• US Classifications

  • 451 - Abrading
  • D15 - Machines not elsewhere specified