3867681

Information

• Patent Grant
• 3867681

• References
• Source

• Patent Number

  3,867,681

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1975
  49 years ago

• CPC

  • H04M19/06 - Current supply source at subordinate switching centre charged from main exchange
  • H02J7/0075 - for charge maintenance, battery initiation or rejuvenation

• US Classifications

  • 320 - Electricity: battery or capacitor charging or discharging