This patent landscape report is dedicated to Atazanavir - an antiretroviral drug used to treat HIV infection and AIDS. A major objective of this report is to examine the evolution of the patent environment protecting Atazanavir from the first filing of this compound to the present filings. The second objective is to provide insight into best practice for probing the patent literature in the pharmaceutical area. Because combination therapies involving more than one drug are such an integral part of pharmaceutical development, and because that is especially true for AIDS therapies, a separate chapter of the report focuses on combinations.