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 …
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