Copyrights are intellectual property rights that protects literary and artistic works; trademarks protects a company's brand (its taste, logo, processor etc); patents are the intellectual property rights to protect works of invention to prevent its misuse. Patents give full rights to the inventor for their invention.
In the above case, Marvella has invented a unique instrument, therefore it must be patented.
The answer for this question is Patent
Marvella has created a high-frequency buzzer that prevents dogs from barking. The moment dogs hear the...