Cheyenne, Aug. 14 -- "Taco Tuesday" may be a well-known term for a themed dinner night out or at home, but as restaurants across the U.S. have learned, it's also trademarked.

Cheyenne-based Taco John's - which has nearly 400 locations in 23 states - put its legal stamp on "Taco Tuesday" 30 years ago and has since zinged cease-and-desist letters at offenders far and wide.

Now, a recent example is stirring a debate that hits close to home for the fast-food chain.

Taco John's last month sent a warning to a brewery five blocks from its national headquarters for using the term to advertise a taco truck that parks outside its establishment once a week.

"We certainly appreciate our fellow community member's enthusiasm for tacos on Tuesdays, ...