proprietary

About 3.23 uses per million words.

Meaning

adjective Of or relating to property or ownership.
proprietary rights
adjective Owning something; having ownership.
the proprietary class
adjective Created or manufactured exclusively by the owner or licensee of intellectual property rights, as with a patent or trade secret.
The continuous profitability of the company is based on its many proprietary products.
adjective Nonstandard and controlled by one particular organization.
a proprietary extension to the HTML standard for Web page structure
adjective Privately owned.
a proprietary lake; a proprietary chapel
adjective Possessive, jealous, or territorial.
noun A proprietor or owner.
noun A body of proprietors, taken collectively.