Granted Patent
Utility
US 5,628,522 · App. 08/613,978
Footed cart having normally disengaged wheels
Inventor:
Donald M. Hall
Patented Case
View Patent ↗
Granted: May 13, 1997
Filed: Mar 11, 1996
Inventor
Donald M. Hall
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.