Răspuns :
In the history of universal invention, Petrache Poenaru is also known as the creator of the first pytle with a pomp, known at the time as the "stylograph". At only 28 years, Petrache Poenaru patented the world's first tank of water, first in Vienna, then in Paris in 1827 (when he was a student), titled "Endless Portraits, feeding himself with ink" the holder of the first patent obtained by a Romanian.
The patent does not only show the inventive spirit of the Romanian student, but also the originality of the concept, as simple as practical. Petrache Poenaru's invention revolutionized the field of writing tools, thus contributing to the creation of an object that is still used by billions of people today. Poenaru Ink Cartridge, the precursor of the modern pen, eliminates paper scratches and unwanted ink leaks, and proposes solutions to improve component parts to ensure a consistent flow of ink and the possibility of replacing parts.
Its system of pushing the ink toward the point where the pen was mounted by lightly pressing the pipe, which is the great innovation in this direction, will later lead to the invention of the piston. Making Poenaru's pen invented and putting it on the market would have shortened the time to the piston. Poenaru, however, failed or was not insistent enough to capitalize on his invention.