History, 04.12.2020 20:30 fatherbamboo

Which of the following inventions were developed by Thomas Edison? a.
typewriter, refrigerated rail car, automatic engine-oiling machine
b.
motor-driven vacuum cleaner, cash register, milking machine
c.
motion picture projector, electric power plant, phonograph
d.
electric streetcar, passenger elevator brake, shoemaking machine

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Which of the following inventions were developed by Thomas Edison? a.
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