[The Electrician]

Can you patent a concept??

It is not a patent that is at issue here, it is a trademark. Entirely different set of laws involved...

[dark_lord]

Yeah, but from what I have learned from going to the government website and looking at the registration of trademarks and servicemarks, I don't see how Honeywell has a case just because it is round. Trademark suits usually involve someone using the same word or symbol with similar colors or fonts. It would be like Coke sueing Pepsi because both use cylindrical cans.