3885440

Information

• Patent Grant
• 3885440

• References
• Source

• Patent Number

  3,885,440

• Date Filed

  Not available

• Date Issued

  Tuesday, May 27, 1975
  50 years ago

• CPC

  • E21B49/025 - of underwater soil
  • E21C50/00 - Obtaining minerals from underwater, not otherwise provided for

• US Classifications

  • 073 - Measuring and testing
  • 037 - Excavating