1. The University of North Carolina at Chapel Hill (22 from 1,270 patents)

2. Xintek, Inc. (7 from 12 patents)

3. North Carolina State University (2 from 1,435 patents)

4. Surround Medical Systems, Inc. (2 from 7 patents)

5. Other (1 from 832,680 patents)

6. Xinray Systems LLC (1 from 3 patents)

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