ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,715,636, issued on Aug. 25, was assigned to Tianxi Wu (Pine Brook, N.J.).
"Multi-functional vacuum sealer" was invented by Guoyong Xu (Dongguan, China) and Jian Zheng (Dongguan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multifunctional vacuum sealer includes a casing, the side wall thereof is provided with a first vacuum cavity, and the upper section thereof is provided with a second vacuum cavity; an internal vacuum pumping and sealing mechanism situated within in the first vacuum cavity, and a cavity vacuum pumping and sealing mechanism, which includes a cavity-type air extraction port extending into the second vacuum chamber, a heating e...