821307

Information

• Patent Grant
• 821307

• References
• Source

• Patent Number

  821,307

• Date Filed

  Not available

• Date Issued

  Tuesday, May 22, 1906
  118 years ago

• CPC

  • F21V7/22 - characterised by the material characterised by surface treatments or coatings
  • F21V1/20 - the material being glass
  • F21V5/02 - of prismatic shape
  • F21V13/04 - the elements being reflectors and refractors

• US Classifications

  • 362 - Illumination
  • D26 - Lighting