@ddtpecko 24 January 2022 more from that month

On this day in 1906, Eduard Slavoljub Penkala, an engineer and inventor, patented the world's first mechanical pencil. He is of Polish-Dutch Jewish descent. Born on April 20, 1871 in Liptószentmiklós, Hungary (now Slovakia). After his marriage, he chose Zagreb as the residence of his family, where he died suddenly on February 5, 1922, at the age of 51. His oeuvre includes from 70 to 80 inventions in the field of mechanics, chemistry, physics, aeronautics, etc. As early as 1903, he patented "Termofor" in Budapest, Vienna and elsewhere. In parallel, he worked on the invention of the mechanical pen and fountain pen. He patented the world's first mechanical pen on January 24, 1906. Already in 1907, he patented the first fountain pen in the world with solid ink, on May 31, 1907. He has patents for the airbag from December 27, 1909, and on December 10, 1909 for the airplane. Engineer Penkala not only applied for patents, but also made an airplane according to his designs and ideas. Patents have been filed in more than 35 countries around the world. If he hadn't been suddenly struck by pneumonia, who knows what he would have invented. First and second photos taken from: https://www.whosdatedwho.com/dating/slavoljub-eduard-penkala Author of the third photo: Roberta F., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=5750731 http://www.rinatravel.com/uploads/about_croatia/suveniri/Slavoljub_Penkala.jpg, Public property, https://commons.wikimedia.org/w/index.php?curid=218001 Author of the fourth photo: http://www.rinatravel.com/uploads/about_croatia/suveniri/Slavoljub_Penkala.jpg, Public property, https://commons.wikimedia.org/w/index.php?curid=218001 Fifth photo taken from: https://www.expatincroatia.com/slavoljub-eduard-penkala/ ************************************************************************************************ Na današnji dan 1906. Eduard Slavoljub Penkala, inženjer i pronalazač, patentirao je prvu mehaničku olovku na svetu. Po poreklu je poljsko-holandski Jevrej. Rođen 20. aprila 1871. u Liptovskom Mikulašu (Liptószentmiklós), u Mađarskoj (danas Slovačka). Nakon ženidbe izabrao je Zagreb kao boravište svoje obitelji, gde je iznenada umro 5. februara 1922. godine, u 51. godini života. Njegov opus obuhvata od 70 do 80 pronalazaka iz područja mehanike, hemije, fizike, aeronautike itd. Već 1903. godine je patentirao "Termofor" u Budimpešti, Beču i drugdje. Usporedno s time radio je na pronalascima mehaničke olovke i nalivpera. Prvu mehaničku olovku na svetu je patentirao 24. januara 1906. godine. Već 1907. godine patentirao je prvo nalivpero na svetu s čvrstim mastilom i to 31. maja 1907. godine.Ima patente za vazdušni jastuk od 27. decembra 1909, a 10. decembra 1909. za avion. Inženjer Penkala ne samo da je prijavljivao patente, već je izrađivao i avion po svojim nacrtima i zamislima. Patenti su prijavljeni u više od 35 zemalja sveta. Da ga nije iznenada pokosila upala pluća ko zna šta bi sve izumeo. Prva i druga fotografija preuzete sa: https://www.whosdatedwho.com/dating/slavoljub-eduard-penkala Autor treće fotografije: Roberta F., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=5750731 http://www.rinatravel.com/uploads/about_croatia/suveniri/Slavoljub_Penkala.jpg, Javno vlasništvo, https://commons.wikimedia.org/w/index.php?curid=218001 Autor četvrte fotografije: http://www.rinatravel.com/uploads/about_croatia/suveniri/Slavoljub_Penkala.jpg, Javno vlasništvo, https://commons.wikimedia.org/w/index.php?curid=218001 Peta fotografija preuzeta sa: https://www.expatincroatia.com/slavoljub-eduard-penkala/