Reginald Fessenden
Reginald Aubrey Fessenden (October 6, 1866 – July 22, 1932) was a Canadian-born inventor, who did a majority of his work in the United States and also claimed U.S. citizenship through his American-born father. During his life he received hundreds of patents in various fields, most notably ones related to radio and sonar.
John F. Yancey
John F. Yancey was 77 years old in April 1903 when he traveled to Gardiner, Montana, to witness the dedication of the Roosevelt Arch by President Theodore Roosevelt on April 24, 1903. Although Yancey witnessed the dedication and apparently met President Roosevelt during the dedication ceremony, he caught a cold and died in Gardiner of pneumonia on May 7, 1903. He is buried in Tinker's Cemetery in Gardiner, within the national park boundaries, approximately northwest of Gardiner on the old Yellowstone Trail road.