3469231

Information

• Patent Grant
• 3469231

• References
• Source

• Patent Number

  3,469,231

• Date Filed

  Not available

• Date Issued

  Tuesday, September 23, 1969
  55 years ago

• CPC

  • G01S3/8055 - adjusting orientation of a single directivity characteristic to produce maximum or minimum signal
  • B63C11/26 - Communication means
  • G01S1/725 - Marker, boundary, call-sign or like beacons transmitting signals not carrying directional information
  • H04B1/034 - Portable transmitters
  • Y10S367/91 - Portable sonar devices

• US Classifications

  • 367 - Communications, electrical: acoustic wave systems and devices
  • 128 - Surgery