3451039

Information

• Patent Grant
• 3451039

• References
• Source

• Patent Number

  3,451,039

• Date Filed

  Not available

• Date Issued

  Tuesday, June 17, 1969
  55 years ago

• CPC

  • H04B11/00 - Transmission systems employing sonic, ultrasonic or infrasonic waves
  • G01S1/72 - using ultrasonic, sonic or infrasonic waves
  • G01S3/8038 - derived from different combinations of signals from separate transducers comparing sum with difference

• US Classifications

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