1913182

Information

• Patent Grant
• 1913182

• References
• Source

• Patent Number

  1,913,182

• Date Filed

  Not available

• Date Issued

  Tuesday, June 6, 1933
  91 years ago

• CPC

  • G03B9/50 - Louvre type

• US Classifications

  • 359 - Optical: systems and elements
  • 396 - Photography