noun
Dated term for patent; modern Japanese normally uses 特許. Still understood but feels old-fashioned.
See also: 特許
この発明には専売特許が与えられた。
A patent was granted for this invention.
専売特許の期限が切れた。
The patent expired.
noun
one's specialty; party piece; signature move
Colloquial use; refers to something a person is particularly good at or known for, often in a playful or boastful way.
彼の専売特許は、どんな会議でも必ず遅刻することだ。
His specialty is always being late to every meeting.
この料理は私の専売特許なんだ。
This dish is my signature creation.