3516286

Information

• Patent Grant
• 3516286

• References
• Source

• Patent Number

  3,516,286

• Date Filed

  Not available

• Date Issued

  Tuesday, June 23, 1970
  54 years ago

• CPC

  • H04R23/004 - using ionised gas
  • G01S1/72 - using ultrasonic, sonic or infrasonic waves
  • G10K15/04 - Sound-producing devices

• US Classifications

  • 073 - Measuring and testing
  • 060 - Power plants
  • 381 - Electrical audio signal processing systems and devices