3439537

Information

• Patent Grant
• 3439537

• References
• Source

• Patent Number

  3,439,537

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1969
  57 years ago

• CPC

  • F42B19/42 - by releasing solid ballast
  • E21B49/025 - of underwater soil

• US Classifications

  • 073 - Measuring and testing
  • 441 - Buoys, rafts, and aquatic devices