1541920

Information

• Patent Grant
• 1541920

• References
• Source

• Patent Number

  1,541,920

• Date Filed

  Not available

• Date Issued

  Tuesday, June 16, 1925
  99 years ago

• CPC

  • B24B3/30 - and rotating the drill about its own axis

• US Classifications

  • 451 - Abrading