3490840

Information

• Patent Grant
• 3490840

• References
• Source

• Patent Number

  3,490,840

• Date Filed

  Not available

• Date Issued

  Tuesday, January 20, 1970
  54 years ago

• CPC

  • G03B23/08 - in which pictures are attached to a movable carrier

• US Classifications

  • 353 - Optics: image projectors
  • 040 - Card, picture, or sign exhibiting