Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Transmittance modulation photomask, process for producing the same, and process for producing diffraction gratings using the same

Transmittance modulation photomask, process for producing the same, and process for producing diffraction gratings using the same

US Patent 4842969 · Granted Jun 27, 1989

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Polarization diffraction element and vector beam mode detection system using the2024
Terahertz wave control element2024
Photoreactive liquid crystal composition, display element, optical element, meth2023
Polymer material, film, circular polarizing plate, image display apparatus, and 2020
Photoreactive liquid crystal composition, display element, optical element, meth2020
Fresnel lens sheet for solar concentration and design method therefor2015
Plastic bonding method2013
Light-condensing film, liquid-crystal panel and backlight as well as manufacturi2013
Optical device provided with polarizing plate2011
Method for producing optical sheet2011
Light-condensing film, liquid-crystal panel and backlight as well as manufacturi2010
Backlight device for liquid crystal display2008