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Alessandro Volta invented the first battery or electrochemical generator capable of producing an electric current maintained over time, and for this reason it was known as a voltaic pile.

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French physician René Laennec invented the first stethoscope using a long, rolled paper tube to funnel sound from the patient's chest to the ear.

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Nicéphore Niépce achieves an image using a camera obscura and a photochemical procedure.

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Samuel Morse developed a first version of his code in 1837 to send numbers, which then had to be converted into full messages using a codebook. This code was expanded by Vail in 1841 to include letters and other punctuation marks, thus creating the current code.

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Invented by the Italian inventor Antonio Meucci. He built it to connect his office with his bedroom so he could talk to his wife, who was immobilized in bed due to illness.

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The Otto engine was the first four-stroke internal combustion engine. Devised in 1876 by the German engineer Nicolaus Otto, it marked the beginning of truly operational internal combustion engines.

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Thomas Alva Edison announced the invention of his first phonograph and patented it that same year. The phonograph used an analog mechanical recording system in which sound waves were transformed into mechanical vibrations by means of an acoustic-mechanical transducer.

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The inventor of the refrigerator was the German Karl von Linde in 1879. He is the creator of the first domestic refrigerator of a mechanical nature that went on the market that same year.

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Thomas Edison, after purchasing the Woodward and Evans patent, presents a light bulb with a carbonated bamboo filament that lasts for 600 hours. The first viable model is born outside the laboratory (commercial).

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Wilhelm Conrad Röntgen, a German scientist at the University of Würzburg, discovered a radiation (of unknown origin at that time, hence its name X-rays) that had the property of penetrating opaque bodies.

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The first vacuum cleaner, created by Hubert Cecil Booth, was a huge machine, with a combustion engine, that sucked in dust. One of the first important tasks was to vacuum and clean the carpet in Westminster Abbey.

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The first motor, prolonged and verified flight in history is atributed to the Wright brothers in 1903, fullfiling then one of the biggest dreams of the human being.