2787670

Information

• Patent Grant
• 2787670

• References
• Source

• Patent Number

  2,787,670

• Date Filed

  Not available

• Date Issued

  Tuesday, April 2, 1957
  67 years ago

• CPC

  • H04R25/652 - Ear tips; Ear moulds
  • H04R2225/59 - Arrangements for selective connection between one or more amplifiers and one or more receivers within one hearing aid

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • D24 - Medical and laboratory equipment