Granted Patent
Utility
US 5,097,607 · App. 07/520,373
Fluid forefoot footware
Inventor:
Raymond M. Fredericksen
Patented Case
View Patent ↗
Granted: Mar 24, 1992
Filed: May 7, 1990
Inventor
Raymond M. Fredericksen
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.