[wang_li]

> If Linux tools used Microsoft utility names, someone would've been sued.

In a universe where Wine exists, you think someone would be sued if they released an app with a default alias mapping dir to ls?

[emilsedgh]

Wine implements a set of API's.

curl and wget could be considered trademarks.

[sho_hn]

wine also ships a regedit.exe, a notepad.exe, ... you can construe this as implementing API (it's usually the motivation) but it gets mushy. PowerShell has a curl also to "implement an interface", however loosely.