Granted Patent
Utility
US 4,999,932 · App. 07/310,836
Variable support shoe
Inventor:
Tracy E. Grim
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: Feb 14, 1989
Inventor
Tracy E. Grim
Assignee (at issue)
Royce Medical Company
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.