1914570

Information

• Patent Grant
• 1914570

• References
• Source

• Patent Number

  1,914,570

• Date Filed

  Not available

• Date Issued

  Tuesday, June 20, 1933
  90 years ago

• CPC

  • H04J7/02 - in which the polarity of the amplitude is characteristic

• US Classifications

  • 370 - Multiplex communications
  • 250 - Radiant energy
  • 332 - Modulators
  • 348 - Television
  • 358 - Facsimile and static presentation processing