Granted Patent
Utility
US 6,254,489 · App. 09/275,640
Amusement attraction with man-made tornado
Inventors:
Nicholas H. Drobnis, Craig Robert Hanna, Philip Hettema, James H. Hightower, Cecil D. Magpuri, Edward S. Newquist
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Mar 24, 1999
Inventors
Nicholas H. Drobnis
Craig Robert Hanna
Philip Hettema
James H. Hightower
Cecil D. Magpuri
Edward S. Newquist
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.