2154898

Information

• Patent Grant
• 2154898

• References
• Source

• Patent Number

  2,154,898

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1939
  85 years ago

• CPC

  • G03B33/14 - using lenticular screens

• US Classifications

  • 355 - Photocopying
  • 352 - Optics: motion pictures