1939785

Information

• Patent Grant
• 1939785

• References
• Source

• Patent Number

  1,939,785

• Date Filed

  Not available

• Date Issued

  Tuesday, December 19, 1933
  91 years ago

• CPC

  • G03B33/14 - using lenticular screens

• US Classifications

  • 396 - Photography
  • 352 - Optics: motion pictures