2667535

Information

• Patent Grant
• 2667535

• References
• Source

• Patent Number

  2,667,535

• Date Filed

  Not available

• Date Issued

  Tuesday, January 26, 1954
  71 years ago

• CPC

  • H04L17/14 - with optical sensing means

• US Classifications

  • 178 - Telegraphy
  • 235 - Registers
  • 250 - Radiant energy
  • 359 - Optical: systems and elements