3688720

Information

• Patent Grant
• 3688720

• References
• Source

• Patent Number

  3,688,720

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1972
  52 years ago

• CPC

  • B63C11/42 - with independent propulsion or direction control
  • B63G8/22 - Adjustment of buoyancy by water ballasting Emptying equipment for ballast tanks
  • B63G8/26 - Trimming equipment

• US Classifications

  • 114 - Ships