3052172

Information

• Patent Grant
• 3052172

• References
• Source

• Patent Number

  3,052,172

• Date Filed

  Not available

• Date Issued

  Tuesday, September 4, 1962
  62 years ago

• CPC

  • G03B9/50 - Louvre type

• US Classifications

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