Granted Patent
Utility
US 6,428,419 · App. 09/547,170
Amusement attraction with moveable floor
Inventor:
Benjamin Sheldon
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Apr 11, 2000
Inventor
Benjamin Sheldon
Assignee (at issue)
Universal City Studios LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.