1877512

Information

• Patent Grant
• 1877512

• References
• Source

• Patent Number

  1,877,512

• Date Filed

  Not available

• Date Issued

  Tuesday, September 13, 1932
  92 years ago

• CPC

  • G02B5/20 - Filters
  • G03C11/10 - for protection from ultra-violet light
  • Y10S359/90 - Methods

• US Classifications

  • 359 - Optical: systems and elements