2881686

Information

• Patent Grant
• 2881686

• References
• Source

• Patent Number

  2,881,686

• Date Filed

  Not available

• Date Issued

  Tuesday, April 14, 1959
  65 years ago

• CPC

  • G03B13/26 - with magnifiers for inspecting image formed on screen

• US Classifications

  • 396 - Photography
  • 356 - Optics: measuring and testing
  • 362 - Illumination