1754044

Information

• Patent Grant
• 1754044

• References
• Source

• Patent Number

  1,754,044

• Date Filed

  Not available

• Date Issued

  Tuesday, April 8, 1930
  94 years ago

• CPC

  • H04R11/00 - Transducers of moving-armature or moving-core type
  • E21F15/06 - Filling-up mechanically
  • H04R7/14 - corrugated, pleated or ribbed
  • H04R7/20 - Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands

• US Classifications

  • 181 - Acoustics