3437988

Information

• Patent Grant
• 3437988

• References
• Source

• Patent Number

  3,437,988

• Date Filed

  Not available

• Date Issued

  Tuesday, April 8, 1969
  55 years ago

• CPC

  • G01V3/088 - operating with electric fields
  • G01S11/023 - using impedance elements varying with distance

• US Classifications

  • 340 - Communications: electrical
  • 331 - Oscillators
  • 361 - Electricity: electrical systems and devices