2705263

Information

• Patent Grant
• 2705263

• References
• Source

• Patent Number

  2,705,263

• Date Filed

  Not available

• Date Issued

  Tuesday, March 29, 1955
  69 years ago

• CPC

  • H04R13/02 - Telephone receivers

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 367 - Communications, electrical: acoustic wave systems and devices