ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,433,166, issued on Sept. 30.

"Ceramic stack assembly fixture" was invented by Matthew Johnson (Springville, Ind.), William Riggins (Bloomington, Ind.) and Scott L. Small (Newberry, Ind.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a fixture for concentrically aligning and assembling a Ceramic Stack Assembly transducer during manufacturing. The CSA fixture comprises a base, a top compression cap, a central rod and a fastener, one or more alignment posts, and a driving wedge. The base further includes a groove to accept and align a transducer rear-centering ring at a central axis of the fixture. The transducer rear-centering ring supports o...