Tutorial Register Plus > 2. Searching using Register Plus > 2.10 Exercises (advanced searches 4/6)
Exercise 4:

The pharmaceutical company Aventis was formed in 1999 by the merger of Hoechst and Rhône-Poulenc.
(a) How many applications filed by Hoechst Marion Roussel in 1999 were included in the merger?
(b) How many were not?
You need to carry out two searches.

Please note that this search area is a simulation of the real Register Plus search area.
In this area you can only do this exercise.
If you want to search for other applications, please switch to the real Register Plus service.
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