2720640

Information

• Patent Grant
• 2720640

• References
• Source

• Patent Number

  2,720,640

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1955
  69 years ago

• CPC

  • B61L19/14 - with electrical locks
  • B61L25/08 - Diagrammatic displays

• US Classifications

  • 200 - Electricity: circuit makers and breakers
  • 340 - Communications: electrical
  • 439 - Electrical connectors