3274881

Information

• Patent Grant
• 3274881

• References
• Source

• Patent Number

  3,274,881

• Date Filed

  Not available

• Date Issued

  Tuesday, September 27, 1966
  58 years ago

• CPC

  • G03B13/26 - with magnifiers for inspecting image formed on screen
  • G03B13/16 - combined with focusing aids

• US Classifications

  • 356 - Optics: measuring and testing
  • 359 - Optical: systems and elements
  • 396 - Photography