I searched for this, to make sure I got the wording right. The results I get are:
- Microsoft acquires Surface Pen technology from N-trig (The Verge)
- Microsoft Acquires Surface 3 Pen Tech From N-trig (TechCrunch)
- Microsoft buys N-trig's digital pen technology for Surface (CNet)
- Microsoft Acquires Pen Technology From N-Trig Ltd (AnandTech)
Even Microsoft's own blog says, "Today we are excited to have acquired advanced digital pen technology from N-trig Ltd"
Do you have a source relating to them buying the whole company?