proprietary

(noun) an unincorporated business owned by a single person who is responsible for its liabilities and entitled to its profits. Synonyms: proprietorship.

(adj) protected by trademark or patent or copyright; made or produced or distributed by one having exclusive rights. Synonyms: proprietary (vs. nonproprietary). Example: "`tylenol' is a proprietary drug of which `acetaminophen' is the generic form."