3680521

Information

• Patent Grant
• 3680521

• References
• Source

• Patent Number

  3,680,521

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1972
  53 years ago

• CPC

  • E02F5/006 - adapted for working ground under water not otherwise provided for
  • B60F3/0053 - Particular devices for gas circulation
  • B63C11/36 - of closed type
  • B63H21/32 - Arrangements of propulsion-unit exhaust uptakes Funnels peculiar to vessels; Small watercraft exhaust arrangements

• US Classifications

  • 114 - Ships
  • 037 - Excavating
  • 180 - Motor vehicles