1812177

Information

• Patent Grant
• 1812177

• References
• Source

• Patent Number

  1,812,177

• Date Filed

  Not available

• Date Issued

  Tuesday, June 30, 1931
  93 years ago

• CPC

  • F21V11/18 - movable
  • F21S48/142 - Attachment thereof
  • F21S48/145 - Details of the shape of screens, non-reflecting members, light-shielding members or fixed shades
  • F21S48/1789 - Rotating screens
  • F21V14/00 - Changing the characteristics or distribution of the light emitted by adjustment of parts or by interposition of elements with electrically controlled variable light transmissivity
  • F21W2101/02 - for land vehicles

• US Classifications

  • 362 - Illumination