3808566

Information

• Patent Grant
• 3808566

• References
• Source

• Patent Number

  3,808,566

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1974
  50 years ago

• CPC

  • H04Q3/0012 - in which the relays are arranged in a matrix configuration
  • H01H67/26 - Co-ordinate-type selector switches not having relays at cross-points but involving mechanical movement
  • H05K1/0237 - High frequency adaptations
  • H05K1/14 - Structural association of two or more printed circuits
  • H05K1/18 - Printed circuits structurally associated with non-printed electric components

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets
  • 333 - Wave transmission lines and networks
  • 361 - Electricity: electrical systems and devices