3490839

Information

• Patent Grant
• 3490839

• References
• Source

• Patent Number

  3,490,839

• Date Filed

  Not available

• Date Issued

  Tuesday, January 20, 1970
  55 years ago

• CPC

  • G02B3/08 - with discontinuous faces
  • G02B19/0028 - refractive and reflective surfaces
  • G02B19/0047 - for use with a light source
  • G03B23/044 - whereby the picture is returned to the same stock
  • Y10S353/01 - Slides stacked with surface to surface contact

• US Classifications

  • 353 - Optics: image projectors