Famous Scientists and their inventions | Inventors and their inventions Part-1

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Inventors and their inventions

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Date: March 17, 2023
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45 thoughts on “Famous Scientists and their inventions | Inventors and their inventions Part-1”

  4. Penkala invented : mechanical pencil solid ink, fountain pen, pen and pencil holder, so-called knipsa thermos flask and hot water bottle, rotary toothbrush, ebonite (the mass from which gramophone records were made), laundry detergent, insecticide rheumatoid medicine xylolite, preparation against parasites in railway sleepers, fluid flow measurement system, wagon brakes manometer, anode battery pocket flashlight, dynamometer special microphone, listening device he perfected the gramophone stylus and the gramophone.

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