ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,443, issued on Oct. 28.
"Continuous container crane device" was invented by Ronald C. Zimmerman (Marvin, N.C.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A continuous container crane device may include a first track having a continuous shape and a second track having a continuous shape. Preferably, the first track may be substantially parallel to the second track. One or more trolleys may be movably coupled to the first track and to the second track so that the trolleys are configured to move in a continuous movement path (starts and finishes at the same place) defined by the first and second track. Each trolley may include a lifting mechanism th...