ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,469,211, issued on Nov. 11, was assigned to Imagination Technologies Ltd. (Kings Langley, Great Britain).

"Processing primitives which have unresolved fragments in a graphics processing system" was invented by John Howson (St Albans, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A graphics processing system performs hidden surface removal and texturing/shading on fragments of primitives. The system includes a primary depth buffer (PDB) for storing depth values of resolved fragments, and a secondary depth buffer (SDB) for storing depth values of unresolved fragments. Incoming fragments are depth tested against depth values from either the ...