1647550

Information

• Patent Grant
• 1647550

• References
• Source

• Patent Number

  1,647,550

• Date Filed

  Not available

• Date Issued

  Tuesday, November 1, 1927
  97 years ago

• CPC

  • E01H8/04 - essentially by non-driven elements Clearing instruments

• US Classifications

  • 037 - Excavating