2457133

Information

• Patent Grant
• 2457133

• References
• Source

• Patent Number

  2,457,133

• Date Filed

  Not available

• Date Issued

  Tuesday, December 28, 1948
  76 years ago

• CPC

  • C04B35/057 - based on calcium oxide
  • H04L17/14 - with optical sensing means
  • H04L21/00 - Apparatus or local circuits for mosaic printer telegraph systems

• US Classifications

  • 178 - Telegraphy
  • 358 - Facsimile and static presentation processing
  • 400 - Typewriting machines