3710137

Information

• Patent Grant
• 3710137

• References
• Source

• Patent Number

  3,710,137

• Date Filed

  Not available

• Date Issued

  Tuesday, January 9, 1973
  52 years ago

• CPC

  • G04C21/28 - by closing a contact to put into action electro-acoustic means
  • G06K7/06 - by means which conduct current when a mark is sensed or absent
  • Y10T307/76 - Selectively actuated
  • Y10T307/951 - With time delay or retardation means

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 200 - Electricity: circuit makers and breakers
  • 361 - Electricity: electrical systems and devices
  • 439 - Electrical connectors
  • 968 - Horology