2518419

Information

• Patent Grant
• 2518419

• References
• Source

• Patent Number

  2,518,419

• Date Filed

  Not available

• Date Issued

  Tuesday, August 8, 1950
  74 years ago

• CPC

  • G09B9/304 - by using a film

• US Classifications

  • 434 - Education and demonstration
  • 353 - Optics: image projectors