US9852163B2
patent
(57) 30 , 2013 Methods and apparatus to de- duplicate impression informa tion are disclosed . An example method to de - duplicate media impression information includes determining an over
19 claims. 255,415 characters of text.
patent
(57) 30 , 2013 Methods and apparatus to de- duplicate impression informa tion are disclosed . An example method to de - duplicate media impression information includes determining an over
19 claims. 255,415 characters of text.