2727943

Information

• Patent Grant
• 2727943

• References
• Source

• Patent Number

  2,727,943

• Date Filed

  Not available

• Date Issued

  Tuesday, December 20, 1955
  69 years ago

• CPC

  • H04L17/14 - with optical sensing means

• US Classifications

  • 178 - Telegraphy
  • 400 - Typewriting machines