1800044

Information

• Patent Grant
• 1800044

• References
• Source

• Patent Number

  1,800,044

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1931
  93 years ago

• CPC

  • F21V11/00 - Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
  • G09F13/30 - with moving light sources

• US Classifications

  • 359 - Optical: systems and elements
  • 356 - Optics: measuring and testing
  • 369 - Dynamic information storage or retrieval