2988600

Information

• Patent Grant
• 2988600

• References
• Source

• Patent Number

  2,988,600

• Date Filed

  Not available

• Date Issued

  Tuesday, June 13, 1961
  63 years ago

• CPC

  • H04M15/10 - Metering calls from calling party
  • H04Q1/30 - Signalling arrangements Manipulation of signalling currents
  • H04Q1/4423 - using one signalling frequency

• US Classifications

  • 379 - Telephonic communications