2642490

Information

• Patent Grant
• 2642490

• References
• Source

• Patent Number

  2,642,490

• Date Filed

  Not available

• Date Issued

  Tuesday, June 16, 1953
  71 years ago

• CPC

  • G04C21/30 - with provision for a number of operations at different times

• US Classifications

  • 340 - Communications: electrical
  • 200 - Electricity: circuit makers and breakers
  • 968 - Horology