In 1928, the material PMMA, polymethyl methacrylate, was invented simultaneously in three different countries - Germany, Spain, and England. Dr. Otto Röhm then developed it further until it was ready for series production and patented the name Plexiglas. Nowadays, Evonik Industries holds the rights to the name. This is understood to be a plastic that is usually transparent, but can also be colored, and has ideal properties for many different applications.