Utility software to access the Visomat Double Comfort blood pressure meter:
http://www.visomat.de/Oberarm-Blutdruckmes.372.0.html
+The same protocol seems to be used also by the Prevention DS-2200PV.
+
The device can store measurements for two distinct users and has a USB port
that can be used to download the history of measurements or trigger a new
measurement (apparently only for user 1).