3602331

Information

• Patent Grant
• 3602331

• References
• Source

• Patent Number

  3,602,331

• Date Filed

  Not available

• Date Issued

  Tuesday, August 31, 1971
  53 years ago

• CPC

  • E01F8/0094 - constructions for generation of phase shifting
  • G10K11/1788 - Structural details
  • G10K2210/103 - Three dimensional
  • G10K2210/12 - Rooms
  • G10K2210/3212 - Actuator details
  • G10K2210/3216 - Cancellation means disposed in the vicinity of the source
  • G10K2210/3229 - Transducers
  • G10K2210/32291 - Plates or thin films

• US Classifications

  • 181 - Acoustics
  • 381 - Electrical audio signal processing systems and devices