3634847

Information

• Patent Grant
• 3634847

• References
• Source

• Patent Number

  3,634,847

• Date Filed

  Not available

• Date Issued

  Tuesday, January 11, 1972
  53 years ago

• CPC

  • G08B1/08 - using electric transmission; transformation of alarm signals to electrical signals from a different medium
  • G04C19/02 - by electric lamps

• US Classifications

  • 340 - Communications: electrical
  • 968 - Horology