An entrepreneur who needs money to create and distribute a new invention would most likely visit a ...

an investment banker. An entrepreneur would need more the services provided by an investment banker rather than from a commercial one, all the more if the project is long term and requires a huge budget. Very simply put, a commercial banker is like a safe money deposit that in exchange for such standardized service, will apply interest rates, for the depositor's (every possible citizen) and the bank's benefit (for loan services etc.), while an investment banker acts as a sort of mediator between sellers and buyers, (corporations, investors, private business etc.), trading in financial assets, providing specific advisory services, handling legal-financial complex procedures for their clients; the latter is thus the correct answer.