LED PatentEdge offers access to comprehensive LED patent database

LED phosphor patents by companyA  research database compiled by IP Checkups contains over 100,000 patent documents from worldwide patent authorities, which are filtered into more than 50 LED categories.

On a regular basis, LEDs Magazine reports on issues relating to LED patents, including both LED patent-infringement lawsuits and licensing agreements. These serve to highlight the ongoing struggle of ownership over fundamental LED technologies.

Source: http://ledsmagazine.com