Brian Brunner is an entrepreneur whose inventions include several devices that firms in the telecommunications industry use. Brian has patents for his devices, which he manufactures in a job shop in Memphis, Tennessee. He sells the devices directly to AT&T and Verizon. Last week, he received a certified letter in the mail from T-Mobile, indicating the firm’s interest in licensing the technology that is the foundation for one of his devices. Brian does not know anything about licensing and is turning to you for help. What would you tell him about licensing? In your opinion, how should Brian respond to T-Mobile’s letter?