ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,735, issued on May 20, was assigned to Pipp Mobile Storage Systems Inc. (Walker, Mich.).
"Single track mobile carriage system" was invented by Andrew B. Hartmann (Muskegon, Mich.) and David E. Kowalski (Grandville, Mich.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A mobile carriage system includes a frame supported by a surface, a drive shaft that extends along the frame and drives a drive wheel to move the frame along the surface, and a guide track that extends along the surface and has an elevated track portion. The drive wheel supports the frame and rolls along the surface, and a guide wheel rides along the elevated track portion. The drive wh...