Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Phase mask with spatially variable diffraction efficiency

Phase mask with spatially variable diffraction efficiency

US Patent 6545808 · Granted Apr 8, 2003

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Distributed approximate nearest neighbor service architecture for retrieving ite2025
Accounting for item attributes when selecting items satisfying a query based on 2025
Hands-free transactions with voice recognition2024
Display method and display device for interactive interface and storage medium2024
Spare tire rack2024
Apparatus and method for effect pigment identification2023
Emotion intervention method, device and system, and computer-readable storage me2023
Hands-free transactions with voice recognition2023
Portable medication dispenser2022
Blood pressure measuring apparatus, blood pressure measuring method, electronic 2022
Pill dispenser2021
Method, client, server and system for detecting tongue image, and tongue imager2021