2178989

Information

• Patent Grant
• 2178989

• References
• Source

• Patent Number

  2,178,989

• Date Filed

  Not available

• Date Issued

  Tuesday, November 7, 1939
  85 years ago

• CPC

  • H04L13/184 - Photographic printing and recording

• US Classifications

  • 178 - Telegraphy
  • 101 - Printing
  • 313 - Electric lamp and discharge devices
  • 315 - Electric lamp and discharge devices: systems
  • 331 - Oscillators
  • 347 - Incremental printing of symbolic information