Wolfgang:
True, DRP could be one of many but at a glance at this time Merkel knows that they have some novel idea centered around the soft solder and are advertising on the tube the term Weichlot as well as on the cards. So I'd say they have full intent on a patent submission as well as protection. Why not advertise on the floorplate in generic terms of DRP without the actual DRP Nr. because they don't possess it just yet? I say every stamp and position of the stamp has/had a purpose. It was not happenstance.

Kind Regards,

Raimey
rse