<P> Progress in developing a reliable pen was slow until the mid-19th century because of an imperfect understanding of the role that air pressure plays in the operation of pens . Furthermore , most inks were highly corrosive and full of sedimentary inclusions . The Romanian inventor Petrache Poenaru received a French patent on May 25 , 1827 , for the invention of the first fountain pen with a barrel made from a large swan quill . </P>
<P> Progress in developing a reliable pen was slow until the mid-19th century because of an imperfect understanding of the role that air pressure plays in the operation of pens . Furthermore , most inks were highly corrosive and full of sedimentary inclusions . The Romanian inventor Petrache Poenaru received a French patent on May 25 , 1827 , for the invention of the first fountain pen with a barrel made from a large swan quill . </P>
who invented fountain pen and in which year
who invented fountain pen and in which year
Petrache Poenaru May 25 , 1827
Petrache Poenaru May 25 , 1827