3894640

Information

• Patent Grant
• 3894640

• References
• Source

• Patent Number

  3,894,640

• Date Filed

  Not available

• Date Issued

  Tuesday, July 15, 1975
  50 years ago

• CPC

  • E21C50/00 - Obtaining minerals from underwater, not otherwise provided for
  • B63B27/08 - using winches
  • B63C7/02 - in which the lifting is done by hauling

• US Classifications

  • 414 - Material or article handling
  • 114 - Ships