ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,017, issued on Dec. 23, was assigned to PRIMAX ELECTRONICS LTD. (Taipei, Taiwan).
"Tray module" was invented by Jui-Jen Cheng (Taipei, Taiwan) and Chang-Ming Huang (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tray module includes a bottom plate, a ring-shaped member, a limiting member, an elastic member and a tray. The ring-shaped member is disposed over the bottom plate and includes a plurality of rolling portions facing the bottom plate. The limiting member is disposed at a periphery of the ring-shaped member and over the ring-shaped member, so that the ring-shaped member is only able to move within a region defined by the limi...