3277247

Information

• Patent Grant
• 3277247

• References
• Source

• Patent Number

  3,277,247

• Date Filed

  Not available

• Date Issued

  Tuesday, October 4, 1966
  58 years ago

• CPC

  • H04M1/03 - Constructional features of telephone transmitters or receivers
  • H04R21/021 - with granular resistance material

• US Classifications

  • 381 - Electrical audio signal processing systems and devices