3452158

Information

• Patent Grant
• 3452158

• References
• Source

• Patent Number

  3,452,158

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1969
  55 years ago

• CPC

  • H04Q3/521 - using semiconductors in the switching stages
  • H03K17/70 - having two electrodes and exhibiting negative resistance

• US Classifications

  • 379 - Telephonic communications
  • 340 - Communications: electrical