3797144

Information

• Patent Grant
• 3797144

• References
• Source

• Patent Number

  3,797,144

• Date Filed

  Not available

• Date Issued

  Tuesday, March 19, 1974
  50 years ago

• CPC

  • G03B23/042 - whereby the picture is not returned to the same stock after projection
  • G09F19/18 - involving the use of optical projection means

• US Classifications

  • 040 - Card, picture, or sign exhibiting