proprietary term
Definition - A name that is owned — i.e. it is someone's or some company's property.

1. The ownership right is asserted through trademarking.

Example -
Kodak, MooT, and The Sopranos

Etymology -
The word proprietary derives from the Latin proprietas, owner.

Oxford English Dictionary -
The term's first citation is from 1921:
"We have expressly recognized that it [sc. Vaseline] is a proprietary term."
(W. A. Craigie Let. 18 Feb. (Oxf. Dict. files))

Please comment