1901

- On 19 December Rudolf Hell is born in Eggmühl (Bavaria)  

1919

 - Studied electrical engineering at the Technical University in Munich

1923-1929

- Assistant with Prof. Dr. Max Dieckmann, Munich

1927

- First marriage with Ms. Martha  

1929

- Founding of his own company in Neubabelsberg near Berlin    

1947

- Foundation of the company in Kiel - Dietrichsdorf

1968

- Second marriage with Ms. Jutta.   
  The daughter Veronika emerges from this marriage.    

1972
- Dr. Hell retires from active management and becomes a member of the Supervisory

    Board as chairman

1989

- Dr. Hell withdrew from active business life.      

2001
- On the 19th of December, Dr.-Ing. Rudolf Hell celebrates his 100th birthday.
- The "Siemenswall" -road to the Heidelberg plant in Kiel-Suchsdorf- is renamed into

   the "Dr.-Hell-street".        

2002
- On March 11 Dr.-Ing. Rudolf Hell passed away in Kiel.
   The funeral takes place in an honorary ceremony of the City of Kiel in the

    Parkfriedhof Eichhof.