2762931

Information

• Patent Grant
• 2762931

• References
• Source

• Patent Number

  2,762,931

• Date Filed

  Not available

• Date Issued

  Tuesday, September 11, 1956
  68 years ago

• CPC

  • H04L17/14 - with optical sensing means

• US Classifications

  • 250 - Radiant energy
  • 178 - Telegraphy
  • 235 - Registers