3627907

Information

• Patent Grant
• 3627907

• References
• Source

• Patent Number

  3,627,907

• Date Filed

  Not available

• Date Issued

  Tuesday, December 14, 1971
  53 years ago

• CPC

  • H04L25/4912 - using CMI or 2-HDB-3 code

• US Classifications

  • 178 - Telegraphy