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invention category A group or set of inventions that are classified together because of common characteristics. Invention groups that include Agricultural, Communications, Computing, Energy, Transportation and more.
A competition sponsored in 1913 by Scientific American asked for essays on the 10 greatest inventions. The rules: âour timeâ meant the previous quarter century, 1888 to 1913; the invention had to be patentable and was considered to date from its âcommercial introduction.â. Perception is at the heart of this question. Inventions are most salient when we can see the historical changes they cause.