1916 – Diving and Excavating Apparatus – Dewey T. Deemer (American)

1916 – Diving and Excavating Apparatus by Dewey T. Deemer   DIVING AND EXCAVATING APPARATUS. Publication number    US1228300 A Publication type    Grant Publication date    May 29, 1917 Filing date    Jul 10, 1916 Priority date    Jul 10, 1916 Inventors    Dewey T Deemer Original Assignee    Dewey T Deemer Be it known that I, DEWEY T. DEEMER, a …