3803462

Information

• Patent Grant
• 3803462

• References
• Source

• Patent Number

  3,803,462

• Date Filed

  Not available

• Date Issued

  Tuesday, April 9, 1974
  50 years ago

• CPC

  • H04R23/006 - using solid state devices
  • H01L29/00 - Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier
  • H04R21/02 - Microphones

• US Classifications

  • 257 - Active solid-state devices