A patent:

Multiple Choice

Is the amount by which the value of a company exceeds the fair market value of a company's net assets if purchased separately.

Gives its owner the exclusive right to publish and sell a musical or literary work during the life of the creator plus $17$ years.

Is an exclusive right granted to its owner to manufacture and sell a device or to use a process for $50$ years.

Is an exclusive right granted to its owner to manufacture and sell a device or to use a process for $20$ years.

Gives its owner the exclusive right to publish and sell a musical or literary work during the life of the creator plus $70$ years.