Here is some reading, please note date:
Publication Number = EP 0786730
Publication Date [1989/01/04 - 2009/09/16]
Also,
https://data.epo.org/publication-server/document?PN=EP0786730%20EP%200786730&iDocId=4976720&iPosition=1&iFormat=0
.
1991 ARM introduced its first embeddable RISC core, the ARM6 solution
http://www.arm.com/aboutarm/milestones.html
.
After reading the material(first link), do you think that any of ARM's system integrators might be liable, if not ARM itself, under the European/German patent?
.
.
Be well