2691070

Information

• Patent Grant
• 2691070

• References
• Source

• Patent Number

  2,691,070

• Date Filed

  Not available

• Date Issued

  Tuesday, October 5, 1954
  70 years ago

• CPC

  • H04M1/54 - Arrangements wherein a dial or equivalent generates identifying signals
  • H04Q5/06 - Signalling by amplitude or polarity of dc

• US Classifications

  • 379 - Telephonic communications