1778320

Information

• Patent Grant
• 1778320

• References
• Source

• Patent Number

  1,778,320

• Date Filed

  Not available

• Date Issued

  Tuesday, October 14, 1930
  94 years ago

• CPC

  • E02B3/02 - Stream regulation
  • E21B7/122 - with submersible vertically movable guide

• US Classifications

  • 175 - Boring or penetrating the earth
  • 037 - Excavating
  • 173 - Tool driving or impacting