Proprietary = owned by a person or company and sold under a trademark or patent
Tradução = patenteado
Em uma reportagem sobre as ações do Facebook Inc.:
"Capstone analyst Rory Maher said he used proprietary software to track user numbers by country over the past six months across more than 200 countries and worked out that the social network had shed users in both the United States and Europe. U.S. users declined by 1.1 percent, he said in a research note."
Proprietário = aquele que possui algo; possuidor; aquele que detém a posse legal de um bem imóvel, etc. = Em inglês = owner