Robert Fulton
The first successful trial run of a steamboat had been made several years earlier in the United States by inventor John Fitch, on the Delaware River on August 22, 1787. Attendees included delegates from the Constitutional Convention, who were observing while taking a break from their summer-long sessions at Independence Hall. The steamboat was propelled by a bank of oars on either side of the boat. The following year Fitch launched a boat powered by a steam engine driving several stern-mounted oars. These oars paddled in a manner similar to the motion of a swimming duck's feet. With this boat he carried up to thirty passengers for hire on numerous round-trip voyages on the Delaware River between Philadelphia and Burlington, New Jersey.
Columbia (sidewheeler 1850)
The Columbia was a steamboat built at Astoria, Oregon in 1850. Columbia was the first steamboat built in the Oregon Territory, and the first to establish regular service on the lower Columbia and Willamette rivers. This vessel should not be confused with the many other craft with the same or a similar name, including in particular at least four other vessels named "Columbia" which ran on the Columbia river or its tributaries.