Belkin, one of the biggest OEMs in the world, recently earned the ire of Microsoft and found themselves the target of a lawsuit. Originally, they were not agreeing to licensing Microsoft's “U2” technology, which despite its name is nothing more than a way for keyboards/mice to determine whether a USB or PS/2 connection should be used. After the pressure of the lawsuit, they have changed their minds and entered into discussions with Microsoft:

"We are pleased to announce that we have settled our dispute with Belkin and that they will be taking a license to use the U2 patents," Deputy General Counsel Tom Burt said in a statement provided to CNET Microsoft did not provide terms of the settlement.
The details of the lawsuit don't specify which products Microsoft felt violated by, and Belkin has not made a public statement regarding the issue aside from confirming they have reached a settlement with Redmond.