Claim: Antoni Grabowski(born 11 June 1857) was a Russian chemical engineer who  worked as a practical chemical engineer in Zawiercie and was known for a multitude of inventions and technological innovations and  made an influential impact on the development of Esperanto or international auxiliary language into a language of literature.
Evidence: Antoni Grabowski (11 June 1857 – 4 July 1921) was a Polish chemical engineer, and an activist of the early Esperanto movement.