Two search-technology patents that have bedeviled the world’s largest tech companies for almost a decade sounded near death Wednesday at the U.S. Court of Appeals for the Federal Circuit.

A three-judge panel seemed inclined to leave in place a trio of Patent Trial and Appeal Board decisions that canceled numerous claims held by the Software Rights Archive. If so, that would hand a win to Facebook Inc., LinkedIn Corp. and Twitter Inc., though it will come too late for Google Inc., which licensed the technology years ago.