Who is invented the mechanical pen, rotating toothbrush, air hover on the airbag,... !?
#technology#science
Eduard (Slavoljub) Penkala (1871-1922), born in Slovakia to a Polish/Dutch family, became naturalized Croat when after his marriage his family immigrated to Zagreb. He...See more
Who is invented the mechanical pen, rotating toothbrush, air hover on the airbag,... !?
#technology#science
Eduard (Slavoljub) Penkala (1871-1922), born in Slovakia to a Polish/Dutch family, became naturalized Croat when after his marriage his family immigrated to Zagreb. He...See more