ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,444,909, issued on Oct. 14, was assigned to ROBERT BOSCH GMBH (Stuttgart, Germany).
"Spark plug" was invented by Corinna Vonau (Stuttgart, Germany) and Sergej Subkow (Kornwestheim, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A spark plug having a longitudinal axis. The spark plug includes: a housing; an insulator disposed at least partly inside the housing; a center electrode disposed at least partly inside the insulator and has an electrode body and an ignition element that is disposed on the combustion chamber-side end of the electrode body and serves as an ignition surface, wherein the ignition element has a cylindrical shape with a round ...