3455630

Information

• Patent Grant
• 3455630

• References
• Source

• Patent Number

  3,455,630

• Date Filed

  Not available

• Date Issued

  Tuesday, July 15, 1969
  55 years ago

• CPC

  • G03B13/26 - with magnifiers for inspecting image formed on screen
  • G01C21/22 - Plotting boards
  • G03B21/00 - Projectors or projection-type viewers Accessories therefor

• US Classifications

  • 353 - Optics: image projectors
  • 356 - Optics: measuring and testing