2417883

Information

• Patent Grant
• 2417883

• References
• Source

• Patent Number

  2,417,883

• Date Filed

  Not available

• Date Issued

  Tuesday, March 25, 1947
  77 years ago

• CPC

  • A61F9/062 - with movable polarising filter discs

• US Classifications

  • 219 - Electric heating
  • 002 - Apparel
  • 359 - Optical: systems and elements