2217279

Information

• Patent Grant
• 2217279

• References
• Source

• Patent Number

  2,217,279

• Date Filed

  Not available

• Date Issued

  Tuesday, October 8, 1940
  84 years ago

• CPC

  • H04R1/288 - for loudspeaker transducers
  • B66F3/08 - screw operated
  • H04R1/26 - Spatial arrangements of separate transducers responsive to two or more frequency ranges
  • B66F2700/04 - Jacks with screw and nut

• US Classifications

  • 181 - Acoustics