1. Tekelec (16 from 321 patents)

2. Oracle International Corporation (3 from 11,327 patents)

3. Camiant, Inc. (3 from 17 patents)

1. 12452641 - Data network name replacement for roaming subscribers

2. 10477385 - Methods, systems and computer readable media for distributing policy rules to the mobile edge

3. 10117127 - Methods, systems, and computer readable media for communicating radio access network congestion status information for large numbers of users

4. 9917700 - Systems, methods, and computer readable media for policy enforcement correlation

5. 9603058 - Methods, systems, and computer readable media for triggering a service node to initiate a session with a policy and charging rules function

6. 9591556 - Methods, systems, and computer readable media for access network discovery and selection

7. 9350876 - Methods, systems, and computer readable media for detecting initiation of a service data flow using a Gx rule

8. 9319318 - Methods, systems, and computer readable media for performing PCRF-based user information pass through

9. 9237595 - Diameter based communication session discovery and recovery

10. 9225849 - Methods, systems, and computer readable media for steering a subscriber between access networks

11. 9215133 - Methods, systems, and computer readable media for detecting orphan Sy or Rx sessions using audit messages with fake parameter values

12. 9166803 - Methods, systems, and computer readable media for service detection over an RX interface

13. 8989056 - Methods, systems, and computer readable media for utilizing quota usage policy control in a diameter-based communication network

14. 8943209 - Methods, systems, and computer readable media for policy and charging rules function (PCRF) fault tolerance

15. 8868032 - Methods, systems, and computer readable media for automatic, recurrent enforcement of a policy rule