You probably have gathered by now that I like thinking and writing about non-traditional trademarks.

For some time, mostly when I’m in the car and I happen to notice them, I have been wondering about the shapes of various retail signs and how many of their owners may have sought to federally register them as non-traditional trademarks, separate and apart from the words.

My brief research has determined that this sign shape has been in use since 1963 by a famous national restaurant chain, and it became federally-registered about seven years ago; it now enjoys incontestable status:

If you need some help in identifying the brand name behind this retail sign shape, click on the hexagonal design above, or click here.

Do you agree that this hexagonal design, the self-proclaimed "French Diamond Design," functions as a trademark without more, namely words and/or colors?