PDL BioPharma, Inc. engages in the management of antibody humanization patents and royalty assets, which consist of Queen et al. patents and license agreements with various biotechnology and pharmaceutical companies. Its Queen et al. patents primarily cover humanized antibodies, methods for humanizing antibodies, polynucleotide encoding in humanized antibodies, and methods of producing humanized antibodies. The company was formerly known as Protein Design Labs, Inc. and changed its name to PDL BioPharma, Inc. in 2006. PDL BioPharma, Inc. was founded in 1986 and is headquartered in Incline Village, Nevada.