invent - to create, to think up, to make something new, expert - a person with special knowledge or skills , deaf - not able to hear, encourage - to support or motivate, device - a piece of equipment, grant - to give formally or officially (usually money), patent - official protection of one's invention, convention - a conference, a large meeting, demonstrate - to show, researcher - a person who studies or looks for information, experiment - to test or to try something to see what happens, breed - to raise animals for reproduction, aviation - flight through machines such as airplanes,

Alexander Graham Bell

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