ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,304, issued on April 22.
"Volleyball training device" was invented by Junhui Huang (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A volleyball training device has a training state and a using state, including a base, a volleyball net component, and an interception net component. The volleyball net component and the interception net component are detachably connected to the base. In the using state, the volleyball net component is connected to the base, and the interception net component is detached from the base. In the training state, the volleyball net component is connected to the base, and the interception net component is conne...