proprietary
adjective
[ prəˈprʌɪət(ə)ri ]
• relating to an owner or ownership.
• "the company has a proprietary right to the property"
• (of a product) marketed under and protected by a registered trade name.
• "proprietary brands of insecticide"
Origin:
late Middle English (as a noun denoting a member of a religious order who held property): from late Latin proprietarius ‘proprietor’, from proprietas (see property).
