Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Hase Kettweisel Tandem (redundent recumbent), Merin Bear Valley (The gopher).
Not to worry. That's actually a frequently asked question.
Examine your chainring more closely. You'll find some other sets of teeth that look like they have exactly the same kind of "damage". Those are actually shifting aids that are designed into the chainring.