proprietary vs patented

proprietary is a noun but patented is not a noun.

Word	Noun	Adjective	Verb	Adverb
proprietary	Yes	Yes	No	No
patented	No	Yes	No	No

proprietary (noun)	patented (noun)
an unincorporated business owned by a single person who is responsible for its liabilities and entitled to its profits

proprietary (adjective)	patented (adjective)
protected by trademark or patent or copyright; made or produced or distributed by one having exclusive rights	(of devices and processes) protected by patent