What did Reginald Fessenden invent?
He invented the radio and Fathometer
The Fessenden family was opposed to slavery as both a moral and religious concern since its founding in America. Therefore, when the Kansas Nebraska Act split the Democrat and Whig parties William Pitt Fessenden went to the antislavery Republican Party which he helped organize. This information can be found in the books by Thomas Green Fessenden and Fessenden Family in America by Edwin Fessenden among others.