Granted Patent
Utility
US 4,934,072 · App. 07/339,198
Fluid dynamic shoe
Inventors:
Raymond M. Fredericksen, Daniel T. Barry, Daniel E. Norton
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Apr 14, 1989
Inventors
Raymond M. Fredericksen
Daniel T. Barry
Daniel E. Norton
Assignee (at issue)
Wolverine World Wide, Inc.
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.