ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,449, issued on Dec. 9, was assigned to SHENZHEN BLACK TECH Co. LTD. (Shenzhen, China).
"Building block" was invented by Lianwu Huang (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A building block includes a building block main body and an installation housing. The building block main body is formed by a plurality of sidewalls connected to each other, the plurality of sidewalls include a first surrounding wall group, an upper sidewall and a lower sidewall connected in sequence, an upper side of the first surrounding wall group is connected to the upper sidewall, a lower side of the first surrounding wall group is connected to the low...