ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,251, issued on May 27.
"Portable line ascending device for sliding or roller sports" was invented by Robert Button (Richmond, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A portable line ascending device to enable users to ascend an incline on sliding or rolling sporting by travelling up an anchored line with the line ascending device. The device includes a mount, a plurality of sheaves connected to the mount, a motor driving the plurality of sheaves, and a power supply to supply electricity to the motor. The plurality of sheaves are configured to enable a line to be wound around at least a portion of each sheave of the plurality of sheaves...