Grinders to grow-lights: First-ever marijuana business convention arrives at the Tacoma Dome

BY C.R. ROBERTS
Staff writerAugust 14, 2014

Matt Mason and two friends drove to Tacoma from Indianapolis, ready to unveil what Mason called “tobacco grinders” at CannaCon.

That’s canna as in cannabis and con as in convention.

Mason calls them “tobacco grinders” because he comes from a state where possession of a certain amount of marijuana is prosecuted as a felony.

http://www.thenewstribune.com/2014/08/14/3331312/grinders-to-grow-lights-first.html