3738446

Information

• Patent Grant
• 3738446

• References
• Source

• Patent Number

  3,738,446

• Date Filed

  Not available

• Date Issued

  Tuesday, June 12, 1973
  52 years ago

• CPC

  • G10K7/06 - in which the sound-producing member is driven by a fluid

• US Classifications

  • 116 - Signals and indicators
  • 367 - Communications, electrical: acoustic wave systems and devices