Stan Lee died of heart failure and breathing problems two weeks ago. This is evident from the final report of the coroner who tolds TMZ.

The death certificate also states that Stan Lee had pneumonia before he died at the age of 95 at the Los Angeles hospital. In recent years, Lee has been staggering with his health.

Stan Lee was the spiritual father of a large number of success strips. Together with his business partner Jack Kirby, he created the Marvel series The Fantastic Four. Then followed include Spider-Man, The Incredible Hulk, X-Men, Iron Man and The Avengers. The Marvel comic strips were almost all filmed in the past ten years. This series turned out to be one of the most successful film series in the history of Hollywood.