ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,728,950, issued on Sept. 8, was assigned to SRAM DEUTSCHLAND GmbH (Schweinfurt, Germany).
"Electric bicycle drive unit and energy storage device" was invented by Henrik Braedt (Dittelbrunn, Germany) and Sebastian Heyna (Dittelbrunn, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electric bicycle drive unit is arranged in a bottom bracket area of a bicycle frame. The drive unit includes a bottom bracket assembly having a bottom bracket shaft, an electric motor device and an energy storage device for supplying energy to the motor device. The energy storage device can be arranged in a down tube of the bicycle frame having a closed tube cross-sec...