ALEXANDRIA, Va., June 18 -- United States Patent no. 12,324,952, issued on June 10, was assigned to NIKE Inc. (Beaverton, Ore.).

"Treadmill with vertically displaceable platform" was invented by Jeffrey A. Beyer (Portland, Ore.), Stacy E. Stamm (Beaverton, Ore.), Jay T. Worobets (Portland, Ore.), Brian R. Brothers (Lake Orion, Mich.), Andrew James Lewis (Royal Oak, Mich.), Thomas J. Sawarynski Jr. (Troy, Mich.) and Edward F. Wettlaufer Jr. (St. Clair Shores, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A treadmill has a base with a vertically displaceable platform. A mechanism is provided that resists the downward movement of the platform in response to a load applied to the platform. The mechanism a...