3638038

Information

• Patent Grant
• 3638038

• References
• Source

• Patent Number

  3,638,038

• Date Filed

  Not available

• Date Issued

  Tuesday, January 25, 1972
  53 years ago

• CPC

  • H03K17/30 - Modifications for providing a predetermined threshold before switching
  • H04Q1/4465 - the same frequency being used for all signalling information

• US Classifications

  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems