Patents by Inventor Ehsan Nahvi

Ehsan Nahvi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optical security device providing color switching or image switching effect
    Patent number: 12370825
    Abstract: An optical security feature has pixels with faceted microstructures supporting nano-patterned optical filters. Each of the pixels includes a substrate and a nanostructure. The substrate is configured to emit light of at least a first wavelength and a second wavelength different than the first wavelength. The microstructure includes a first facet, a second facet non-parallel to the first facet, a first nano-patterned optical filter disposed on the first facet, and a second nano-patterned optical filter disposed on the second facet. The first nano-patterned optical filter includes a first stopband that includes the first wavelength and excludes the second wavelength. The second nano-patterned optical filter includes a second stopband that includes the second wavelength and excludes the first wavelength. For each pixel, the first nano-patterned optical filter inhibits emission of light at the first wavelength from the pixel via the first facet.
    Type: Grant
    Filed: March 9, 2024
    Date of Patent: July 29, 2025
    Assignee: Authentix, Inc.
    Inventors: Milad Khoshnegar Shahrestani, Clint K. Landrock, Ehsan Nahvi
  • Optical Security Device Providing Color Switching Or Image Switching Effect
    Publication number: 20240208258
    Abstract: An optical security feature has pixels with faceted microstructures supporting nano-patterned optical filters. Each of the pixels includes a substrate and a nanostructure. The substrate is configured to emit light of at least a first wavelength and a second wavelength different than the first wavelength. The microstructure includes a first facet, a second facet non-parallel to the first facet, a first nano-patterned optical filter disposed on the first facet, and a second nano-patterned optical filter disposed on the second facet. The first nano-patterned optical filter includes a first stopband that includes the first wavelength and excludes the second wavelength. The second nano-patterned optical filter includes a second stopband that includes the second wavelength and excludes the first wavelength. For each pixel, the first nano-patterned optical filter inhibits emission of light at the first wavelength from the pixel via the first facet.
    Type: Application
    Filed: March 9, 2024
    Publication date: June 27, 2024
    Inventors: Milad Khoshnegar Shahrestani, Clint K. Landrock, Ehsan Nahvi