ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,385,446, issued on Aug. 12, was assigned to Robert Bosch GmbH (Stuttgart, Germany).
"Internal combustion engine with spark plug and prechamber spark plug" was invented by Alexander Eichhorn (Freiberg, Germany) and Alexander Hettinger (Wiernsheim, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to an internal combustion engine comprising at least one cylinder, four charge-exchange points per cylinder, wherein a first and a second charge-exchange port are each an inlet port, and wherein a third and a fourth charge-exchange port are each an outlet port, also comprising one spark plug and one prechamber spark plug per e...