US Patent Issued on July 28 for "Multi-configuration herb grinder with enhanced crushing efficiency and interchangeable contoured grinding surfaces" (Oregon Inventor)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,690,716, issued on July 28.

"Multi-configuration herb grinder with enhanced crushing efficiency and interchangeable contoured grinding surfaces" was invented by Ayman Abu Khader (Portland, Ore.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A grinder comprises an upper grinding housing with an upper contoured grinding surface and a lower grinding housing with a lower contoured grinding surface. The lower contoured grinding surface has multiple openings. The upper and lower contoured grinding surfaces have no teeth or protruding, non-smooth features as in conventional grinders. In operation, ground material falls between the openings and is collected in ...