US Patent 10536543 Methods and apparatus to share online media impressions data

Methods and apparatus to share online media impression data are disclosed. An example apparatus includes a communications interface; and a processor to generate instructions to be included in a web site and to cause the communications interface to provide the instructions to a web server associated with the web site, the instructions to cause a client, upon execution of the instructions, to initiate a process including sending a first request to an audience measurement entity; and sending a second request to cause a database proprietor to send to the audience measurement entity a cookie mapping of an audience measurement entity cookie to a database proprietor cookie corresponding to the client.