2474490

Information

• Patent Grant
• 2474490

• References
• Source

• Patent Number

  2,474,490

• Date Filed

  Not available

• Date Issued

  Tuesday, June 28, 1949
  75 years ago

• CPC

  • H04L25/202 - using mechanical devices
  • H04L25/245 - for start-stop signals

• US Classifications

  • 178 - Telegraphy