3011028

Information

• Patent Grant
• 3011028

• References
• Source

• Patent Number

  3,011,028

• Date Filed

  Not available

• Date Issued

  Tuesday, November 28, 1961
  63 years ago

• CPC

  • H04M1/515 - by generating or selecting other signals than trains of pulses of similar shape or other signals than currents of one or more different frequencies
  • H04Q3/00 - Selecting arrangements

• US Classifications

  • 379 - Telephonic communications
  • 361 - Electricity: electrical systems and devices