Granted Patent
Utility
US 5,301,828 · App. 07/922,037
Secondary shoe seal
Inventor:
Donald W. McKay
Patented Case
View Patent ↗
Granted: Apr 12, 1994
Filed: Jul 29, 1992
Inventor
Donald W. McKay
Assignee (at issue)
HMT 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.