2722565

Information

• Patent Grant
• 2722565

• References
• Source

• Patent Number

  2,722,565

• Date Filed

  Not available

• Date Issued

  Tuesday, November 1, 1955
  70 years ago

• CPC

  • H04L25/207 - using electromagnetic switches

• US Classifications

  • 178 - Telegraphy
  • 307 - Electrical transmission or interconnection systems