2237929

Information

• Patent Grant
• 2237929

• References
• Source

• Patent Number

  2,237,929

• Date Filed

  Not available

• Date Issued

  Tuesday, April 8, 1941
  83 years ago

• CPC

  • H04L5/1407 - Artificial lines or their setting

• US Classifications

  • 178 - Telegraphy