Justin Chancellor was definitely responsible for a couple. Prior to being reissued, you'd struggle to find a Digitech Bass Whammy for less than Β£500. The Guyatone Bottom Wah Rocker was (and probably still is) changing hands for silly money after he used one. Similarly, the price of Wal basses went through the roof when it was revealed he'd used them for almost all of his work with Tool. There's probably a couple of others I can't remember too.