3871751

Information

• Patent Grant
• 3871751

• References
• Source

• Patent Number

  3,871,751

• Date Filed

  Not available

• Date Issued

  Tuesday, March 18, 1975
  49 years ago

• CPC

  • G02B17/0668 - having non-imaging properties
  • G02B19/0023 - at least one surface having optical power
  • G02B19/0047 - for use with a light source

• US Classifications

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