This patented device contains a firearm aimed at the opening of an animal burrow. When the animal emerges the gun automatically fires, supposedly killing the…
On January 10, 1893, Thomas Lane patented the electric gas lighter. Patent Information Publication number: US489653 A Patent Title: Electric gas-lighter Publication type: Grant…
In the proposed marketplace, 3D printing service providers compete to fulfil requests for 3D printing tasks. Participants such as CAD designers, manufacturers, engineers and users…
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