Aperson wishing to manufacture and sell a product that another holds the patent on

Must wait for 20 years

Explanation:

Exclusive rights granted for an invention is patent. The law protects the invention from commercial exploitation by others apart from the inventor. The protection is time-limited.

Patents last for 20 years. Before the expiry of the 20 years, any attempts to produce goods under patent protection is illegal. A person wishing to manufacture and sell goods under patent must wait for its expiry.

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