Most useful Inventions by countries | Top Inventions that changed the world

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An invention is a device, process, or method that is novel and/or unique. Its design is an improvement of an existing device or product. It can also be a new process for producing a result or object. An invention could be a radical breakthrough or a unique function not apparent to others in the same field. Inventions are important to design and artistic creativity or innovation. They often expand the limits of human capability, experience, and knowledge.
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