Final answer:
The landmark Supreme Court case of Gibbons v. Ogden dealt with the issue of steamboat licenses and interstate commerce.
Step-by-step explanation:
In the case of Gibbons v. Ogden, steamboat licenses were at issue. After the invention of the steamboat by Robert Fulton, the New York state legislature granted Fulton and Robert Livingston exclusive control over ferry traffic on the Hudson River. They had the authority to grant permits to ferry operators, and this led to a dispute between Thomas Gibbons and Adam Ogden. The Supreme Court ultimately ruled that the New York monopoly law was unconstitutional and that the power to regulate commerce between states rested with Congress.