Red Hat legal argument on tenuous ground?

eadwriteweb has a story today on Red Hat sending a cease and desist letter to over their use of an “infinity” logo.

Here’s the DataPortability logo:


And here’s the Fedora logo:


Except I suspect they’re all on weak ground, because Dataproducts, a company that has been around for a long time, has been using a similar logo for years:


(Dataproducts was actually a customer of mine back in the mid-eighties, and the lead engineer on our Ninja product used to work for them. While they are not widely known, they made printers for mainframes, and apparently now they’re in the business of ink refills.)