3764964

Information

• Patent Grant
• 3764964

• References
• Source

• Patent Number

  3,764,964

• Date Filed

  Not available

• Date Issued

  Tuesday, October 9, 1973
  51 years ago

• CPC

  • G01S3/808 - using transducers spaced apart and measuring phase or time difference between signals therefrom
  • G01S5/20 - Position of source determined by a plurality of spaced direction-finders
  • G07C5/0875 - using magnetic data carriers
  • Y10S367/901 - Noise or unwanted signal reduction in nonseismic receiving system

• US Classifications

  • 367 - Communications, electrical: acoustic wave systems and devices
  • 342 - Communications: directive radio wave systems and devices