1817998

Information

• Patent Grant
• 1817998

• References
• Source

• Patent Number

  1,817,998

• Date Filed

  Not available

• Date Issued

  Tuesday, August 11, 1931
  93 years ago

• CPC

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

• US Classifications

  • 037 - Excavating