1768874

Information

• Patent Grant
• 1768874

• References
• Source

• Patent Number

  1,768,874

• Date Filed

  Not available

• Date Issued

  Tuesday, July 1, 1930
  95 years ago

• CPC

  • H04N7/045 - the carrier being frequency modulated
  • H03C3/36 - by means of light-sensitive element

• US Classifications

  • 348 - Television
  • 250 - Radiant energy
  • 315 - Electric lamp and discharge devices: systems
  • 332 - Modulators
  • 359 - Optical: systems and elements
  • 455 - Telecommunications