3620600

Information

• Patent Grant
• 3620600

• References
• Source

• Patent Number

  3,620,600

• Date Filed

  Not available

• Date Issued

  Tuesday, November 16, 1971
  53 years ago

• CPC

  • B61L29/24 - Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching
  • B61L5/1845 - Optical systems, lenses
  • F21V5/00 - Refractors for light sources

• US Classifications

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