Granted Patent
Utility
US 5,573,213 · App. 08/426,970
Walker glide
Inventors:
Richard E. Henderson, Kathleen O'Brien
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Apr 24, 1995
Inventors
Richard E. Henderson
Kathleen O'Brien
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.