3631444

Information

• Patent Grant
• 3631444

• References
• Source

• Patent Number

  3,631,444

• Date Filed

  Not available

• Date Issued

  Tuesday, December 28, 1971
  52 years ago

• CPC

  • G08B19/00 - Alarms responsive to two or more different undesired or abnormal conditions
  • G07C9/0069 - actuated in a predetermined sequence
  • Y10T70/675 - Serially operable

• US Classifications

  • 340 - Communications: electrical
  • 070 - Locks