2939923

Information

• Patent Grant
• 2939923

• References
• Source

• Patent Number

  2,939,923

• Date Filed

  Not available

• Date Issued

  Tuesday, June 7, 1960
  64 years ago

• CPC

  • H04R25/656 - Non-customized, universal ear tips
  • H04R1/1016 - Earpieces of the intra-aural type
  • H04R25/652 - Ear tips; Ear moulds
  • H04R1/105 - Earpiece supports
  • H04R25/04 - comprising pocket amplifiers

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 063 - Jewelry