ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,413, issued on Sept. 16, was assigned to Allison Transmission Inc. (Indianapolis).
"Three speed planetary transmission" was invented by Isaac Mock (Martinsville, Ind.) and Joel E. Mowatt (Carmel, Ind.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A drive system for a hybrid or electric vehicle that includes a transmission with three forward and three reverse gears. The transmission optionally includes a first and a second planetary gearset, a first and a second clutch, and a brake. The system may be configured to separately engage these components in concert. The drive system may include a single electric motor with a corresponding transmission, o...