1. The Nielsen Comapny (us), LLC (159 from 2,165 patents)

2. The Nielson Company (us), LLC (1 from 22 patents)

1. 12501090 - Methods and apparatus to determine a duration of media presentation based on tuning session duration

2. 12499468 - Methods and apparatus to perform computer-based monitoring of audiences of network-based media by using information theory to estimate intermediate level unions

3. 12450620 - Methods and apparatus to generate audience metrics using matrix analysis

4. 12443971 - Methods, systems, apparatus and articles of manufacture to determine causal effects

5. 12436952 - Method and system for estimating the cardinality of information

6. 12423717 - Methods and apparatus to apply household-level weights to household-member level audience measurement data

7. 12399876 - Methods and apparatus to estimate audience sizes of media using deduplication based on multiple vectors of counts

8. 12393957 - Methods and apparatus to estimate de-duplicated unknown total audience sizes based on partial information of known audiences

9. 12387227 - Methods and apparatus to estimate cardinality of users represented in arbitrarily distributed bloom filters

10. 12363365 - Methods and apparatus to estimate population reach from marginal ratings with missing information

11. 12361439 - Methods, systems, articles of manufacture, and apparatus to estimate audience population

12. 12356032 - Methods and apparatus to determine probabilistic media viewing metrics

13. 12346920 - Methods and apparatus to correct for deterioration of a demographic model to associate demographic information with media impression information

14. 12294764 - Methods and apparatus to identify inconsistencies in audience measurement data

15. 12277569 - Methods and apparatus for estimating total unique audiences