/ˈpeɪtnt ˈnʌmbər/ – Phrase
Definition: Số bằng sáng chế.
A more throughout explanation: an official reference number given to a patent (=the official right to the exclusive use of an invention, or to licence the invention)
Example: In its petitions, Spansion challenges the validity of three patents – U.S. patent numbers 6,552,360, 6,100,557 and 6,002,630.