US Patent 10027773 Methods and apparatus to share online media impressions data

Methods and apparatus to share online media impression data are disclosed. An example method includes receiving, at a database proprietor, a first request from a client device, the first request including an audience measurement entity cookie identifier of an audience measurement entity cookie; and determining, with a processor of the database proprietor, a cookie mapping of the audience measurement entity cookie to a database proprietor cookie that is assigned by the database proprietor and associated with the client device.