1915 – The Radium Destroyer – Hugo Gernsback (American)

November, 1915 THE ELECTRICAL EXPERIMENTER by Hugo Gernsback. Front cover -"THE RADIUM DESTROYER" from a painting by Thomas H. Wrenn. (typo- actually Thomas N. Wrenn) Warfare of the Future The Radium Destroyer THE European War has clearly demonstrated what a tremendous part modern science plays in the offense as well as in the defense of …

1914-28 – Submarine Armor – Harry L. Bowdoin (American)

The 1931 version of Harry L. Bowdoin's Submarine Armor. When inside his suit Mr. Bowdoin through the manipulation of gears and levers, can move his arms, legs and body freely to almost any angle and with clawed hands, so constructed as to record sensitivity, he can pick up even very small objects. 1928 – Submarine …

1915 – Electric Dog – Christian Berger – (Hungarian / American)

I found a single reference to a French Electric Dog that "will jump out of its kennel when a whistle sounds". The rest of the brief article talks about Miessner's "Electric Dog". Ingenious Mechanism – Le Grand Reporter, 30 Dec 1921 p2  The electric dog which will follow a lantern in the dark—a mechanical curio constructed by …