1. Mallinckrodt, Inc. (27 from 717 patents)

2. University of California (13 from 15,458 patents)

3. Irm LLC (11 from 151 patents)

4. Novartis Ag (2 from 3,923 patents)

5. Other (1 from 832,680 patents)

6. Metabasis Therapeutics, Inc. (1 from 63 patents)

7. Specgx LLC (21 patents)

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