187423

Information

• Patent Grant
• 187423

• References
• Source

• Patent Number

  187,423

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1877
  148 years ago

• CPC

  • F21V1/20 - the material being glass
  • F21V3/02 - characterised by the shape
  • F21V13/04 - the elements being reflectors and refractors

• US Classifications

  • 362 - Illumination
  • D26 - Lighting