Tag: 1918

1918 – Diving Armor – Rudi De Graff (Russian / American)

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 1918 – Diving Armor by Rudi De Graff. Publication number    US1368786 A Publication type    Grant Publication date    Feb 15, 1921 Filing date    Jan 12, 1918 Priority date    Jan 12, 1918 Inventors    Rudi De Graff The invention relates to diving suits designed for service at great depths, one hundred feet or more, and the object …

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1918 – Submarine Armor – Josef Kamieniecki (Russian/American)

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Publication number    US1370590 A Publication type    Grant Publication date    Mar 8, 1921 Filing date    Dec 2, 1918 Priority date    Dec 2, 1918 Inventors    Josef Kamieniecki Original Assignee    Josef Kamieniecki This invention relates to submarine or diving armor, and more particularly to a metal sectional armor of this type which by reason ot its strength and …

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