what type of inventions did einstein invent? are they still used now
Einstien didn't invent anything.  He did recieve a Noble Prize for his work on the photoelectric effect in metals.  His work also had a profound influence on the study of relativity and gravitation.
I'd say having mobile phones which combine decent MP3 players and reasonable PDA functionality. People don't want to carry separate MP3 player and phone. So the phone companies are working on it, as are Apple, allegedly.