ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,995, issued on March 17, was assigned to Above Space Development Corp. (Huntsville, Ala.).

"Systems and methods for providing a hybrid gravity environment" was invented by Tim Alatorre (Huntsville, Ala.), Thomas R. Spilker (Monrovia, Calif.) and Jeffery Buyers Greenblatt (Astoria, Ore.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides an apparatus comprising a first outer ring module and a second outer ring module configured to produce artificial gravity environments when revolved about a rotational axis. At least one circumferential access tube may connect the first and second outer ring modules. A central hub may be c...