2729771

Information

• Patent Grant
• 2729771

• References
• Source

• Patent Number

  2,729,771

• Date Filed

  Not available

• Date Issued

  Tuesday, January 3, 1956
  68 years ago

• CPC

  • H04Q9/10 - using single different frequencies
  • H01H47/20 - for producing frequency-selective operation of the relay

• US Classifications

  • 361 - Electricity: electrical systems and devices