ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,028, issued on Dec. 9.
"Vacuum pumping device" was invented by Hui Wu (Xinyang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vacuum pumping device is provided, which includes a negative pressure generating device, and the negative pressure generating device is provided with a first negative pressure suction port and a first connection structure; a Mason bottle adapter, which is provided with a first Mason bottle docking chamber and a second connection structure. The Mason bottle adapter is detachably connected to the first connection structure through the second connection structure, and an airway connection is formed between the first nega...