Granted Patent
Utility
US 6,443,261 · App. 09/637,042
Step stool
Inventors:
William R. Gibson, Enrique R. Giner
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Aug 11, 2000
Inventors
William R. Gibson
Enrique R. Giner
Assignee (at issue)
Cosco Management, Inc.
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.