U.S. federal trademark · Serial No. 74460749 · Reg. No. 1425732
power operated filtration system for waste water and sewage treatment without use of a mesh like screen, said system being comprised of several vertically extended solid shafts on which are mounted solid discs, with solid spacers in between, discs of each shaft being interleaved with the discs of the adjacent shafts to provide narrow gaps therebetween
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.