3704442

Information

• Patent Grant
• 3704442

• References
• Source

• Patent Number

  3,704,442

• Date Filed

  Not available

• Date Issued

  Tuesday, November 28, 1972
  52 years ago

• CPC

  • G01S15/36 - with phase comparison between the received signal and the contemporaneously transmitted signal
  • G01G23/28 - involving auxiliary or memory marks

• US Classifications

  • 367 - Communications, electrical: acoustic wave systems and devices
  • 073 - Measuring and testing
  • 114 - Ships