3493695

Information

• Patent Grant
• 3493695

• References
• Source

• Patent Number

  3,493,695

• Date Filed

  Not available

• Date Issued

  Tuesday, February 3, 1970
  55 years ago

• CPC

  • H03F3/183 - with semiconductor devices only
  • H04R25/556 - External connectors
  • H04R2225/31 - Aspects of the use of accumulators in hearing aids
  • Y10S320/15 - Polarity control
  • Y10S320/26 - Button or hearing aid type

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 320 - Electricity: battery or capacitor charging or discharging