2447069

Information

• Patent Grant
• 2447069

• References
• Source

• Patent Number

  2,447,069

• Date Filed

  Not available

• Date Issued

  Tuesday, August 17, 1948
  76 years ago

• CPC

  • B63B49/00 - Arrangements of nautical instruments or navigational aids
  • G01S1/72 - using ultrasonic, sonic or infrasonic waves
  • B63B2726/00 - Miscellaneous signalling devices and draft indicators

• US Classifications

  • 367 - Communications, electrical: acoustic wave systems and devices
  • 073 - Measuring and testing
  • 434 - Education and demonstration
  • 441 - Buoys, rafts, and aquatic devices