3805429

Information

• Patent Grant
• 3805429

• References
• Source

• Patent Number

  3,805,429

• Date Filed

  Not available

• Date Issued

  Tuesday, April 23, 1974
  50 years ago

• CPC

  • G09B29/104 - involving the optical projection of slides, microfilm or the like
  • B60R7/081 - for supporting maps
  • G02B25/02 - with means for illuminating object viewed

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 359 - Optical: systems and elements