2276132

Information

• Patent Grant
• 2276132

• References
• Source

• Patent Number

  2,276,132

• Date Filed

  Not available

• Date Issued

  Tuesday, March 10, 1942
  83 years ago

• CPC

  • H04J1/045 - Filters applied to frequency transposition
  • H04J1/085 - Terminal station; Combined modulator and demodulator circuits
  • H04M1/78 - Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal

• US Classifications

  • 370 - Multiplex communications
  • 455 - Telecommunications