Sean Sullivan of Powell demonstrated his invention, the "Dent Buster," at the Invention Convention in May.

Sean Sullivan of Powell demonstrated his invention, the "Dent Buster," at the Invention Convention in May.

His entry was among the 11 inventions selected by Time Warner Cable to compete for a $500 cash prize in the "Coolest Creations" Viewer's Choice contest.

Videos may be viewed on Time Warner Cable's local on demand channel 411 by selecting the "Viewer's Choice" category.

Each time a finalist video is viewed, it counts as a vote for that finalist.

Sullivan is a student at St. Michael School.

The videos will be available through Aug. 31.