Answer:
Submarine patent
Explanation:
Is a type of patent that intentionally delay first published or filling and granted long after the filing of the initial application
Answer: SUBMARINE
Explanation: A submarine patent is where patents applications and publications are intentionally delayed to give room for others products of similar nature to be developed.
Submarine patents could stay lowkey or "under water" for long periods until they suddenly come out into the market.
Persons making use of this submarine patents are usually referred to as "submarine pirates".