2275017

Information

• Patent Grant
• 2275017

• References
• Source

• Patent Number

  2,275,017

• Date Filed

  Not available

• Date Issued

  Tuesday, March 3, 1942
  82 years ago

• CPC

  • H04L13/184 - Photographic printing and recording
  • H01J31/16 - with mask carrying a number of selectively displayable signs

• US Classifications

  • 178 - Telegraphy
  • 313 - Electric lamp and discharge devices
  • 332 - Modulators