3631351

Information

• Patent Grant
• 3631351

• References
• Source

• Patent Number

  3,631,351

• Date Filed

  Not available

• Date Issued

  Tuesday, December 28, 1971
  53 years ago

• CPC

  • G01S13/38 - wherein more than one modulation frequency is used
  • G06G7/1935 - by converting at least one the input signals into a two level signal
  • G06G7/25 - for discontinuous functions
  • H03D1/00 - Demodulation of amplitude-modulated oscillations

• US Classifications

  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 324 - Electricity: measuring and testing
  • 342 - Communications: directive radio wave systems and devices
  • 455 - Telecommunications