2720137

Information

• Patent Grant
• 2720137

• References
• Source

• Patent Number

  2,720,137

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1955
  69 years ago

• CPC

  • G03B23/125 - the pictures being attached to a chain or linked up to form a chain

• US Classifications

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