Granted Patent
Utility
US 5,561,920 · App. 08/331,142
Shoe construction having an energy return system
Inventors:
Kenneth D. Graham, Bernie Allen, Michael P. Kirk, Stephen A. Francis, Edward Tavino, Kenton D. Geer, Gary J. Troy
Patented Case
View Patent ↗
Granted: Oct 8, 1996
Filed: Oct 17, 1994
Inventors
Kenneth D. Graham
Bernie Allen
Michael P. Kirk
Stephen A. Francis
Edward Tavino
Kenton D. Geer
Gary J. Troy
Assignee (at issue)
Hyde Athletic Industries, 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.