3889307

Information

• Patent Grant
• 3889307

• References
• Source

• Patent Number

  3,889,307

• Date Filed

  Not available

• Date Issued

  Tuesday, June 17, 1975
  49 years ago

• CPC

  • E21B41/10 - Guide posts
  • B63B22/06 - with means to cause the buoy to surface in response to a transmitted signal
  • B63B2205/06 - Reel for tether
  • B63B2209/04 - water activated batteries

• US Classifications

  • 441 - Buoys, rafts, and aquatic devices
  • 367 - Communications, electrical: acoustic wave systems and devices