1828284

Information

• Patent Grant
• 1828284

• References
• Source

• Patent Number

  1,828,284

• Date Filed

  Not available

• Date Issued

  Tuesday, October 20, 1931
  93 years ago

• CPC

  • H04R7/14 - corrugated, pleated or ribbed
  • H04R9/02 - Details
  • H04R9/06 - Loudspeakers
  • H04R9/025 - Magnetic circuit
  • H04R2209/021 - Reduction of eddy currents in the magnetic circuit of electrodynamic loudspeaker transducer

• US Classifications

  • 381 - Electrical audio signal processing systems and devices