2644937

Information

• Patent Grant
• 2644937

• References
• Source

• Patent Number

  2,644,937

• Date Filed

  Not available

• Date Issued

  Tuesday, July 7, 1953
  71 years ago

• CPC

  • H04L15/26 - Operating only on reception of predetermined code signals
  • G08B23/00 - Alarms responsive to unspecified undesired or abnormal conditions

• US Classifications

  • 178 - Telegraphy