2719250

Information

• Patent Grant
• 2719250

• References
• Source

• Patent Number

  2,719,250

• Date Filed

  Not available

• Date Issued

  Tuesday, September 27, 1955
  69 years ago

• CPC

  • G11C11/28 - using gas-filled tubes
  • H03K23/82 - using gas-filled tubes
  • H04M3/64 - Arrangements for signalling the number or class of the calling line to the operator
  • H04Q3/42 - Circuit arrangements for indirect selecting controlled by common circuits

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 377 - Electrical pulse counters, pulse dividers, or shift registers: circuits and systems
  • 379 - Telephonic communications
  • 987 - Organic compounds containing a bi, sb, as, or p atom or containing a metal atom of the 6th to 8th group of the periodic system