3657693

Information

• Patent Grant
• 3657693

• References
• Source

• Patent Number

  3,657,693

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1972
  53 years ago

• CPC

  • G01S3/14 - Systems for determining direction or deviation from predetermined direction
  • G01S3/8032 - wherein the signals are derived sequentially

• US Classifications

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