The people a user is presumed to know or be associated with may be determined using a number of techniques. This information about people that the user knows is used in relation to the user's communications. For example, a display of e-mail may only show the user e-mails from known people....http://www.google.fr/patents/US7613776?utm_source=gb-gplus-shareBrevet US7613776 - Identifying and using identities deemed to be known to a user
Identifying and using identities deemed to be known to a user
