3456771

Information

• Patent Grant
• 3456771

• References
• Source

• Patent Number

  3,456,771

• Date Filed

  Not available

• Date Issued

  Tuesday, July 22, 1969
  55 years ago

• CPC

  • G09F15/0012 - frames therefor
  • G07F9/02 - Devices for alarm or indication
  • G09F13/00 - Illuminated signs Luminous advertising
  • G09F19/04 - operated by the opening or closing of doors

• US Classifications

  • 194 - Check-actuated control mechanisms