3486817

Information

• Patent Grant
• 3486817

• References
• Source

• Patent Number

  3,486,817

• Date Filed

  Not available

• Date Issued

  Tuesday, December 30, 1969
  55 years ago

• CPC

  • G03B21/132 - Overhead projectors
  • Y10S353/04 - Opaque

• US Classifications

  • 353 - Optics: image projectors
  • 359 - Optical: systems and elements