Douglas is pleased to announce that the US Patent and Trademark office awarded two patents on the innovative and game changing Vortex® Spiral Clean Pulley. Patent Numbers 10,124,964 B2 Patent & D838428 were issued to Douglas Manufacturing in November 2018 and January 2019 respectively. The patents recognize the groundbreaking work carried out by the Douglas team.
Vortex® Spiral Clean Pulley Awarded Patents
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