Granted Patent
Utility
US 4,968,091 · App. 07/388,695
Article useful as booster chair and as step stool
Inventor:
John V. Mariol
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Aug 2, 1989
Inventor
John V. Mariol
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.