Granted Patent
Utility
US 4,391,010 · App. 06/293,864
Disposable draw sheet
Inventor:
Albert F. Kronman
Patented Case
View Patent ↗
Granted: Jul 5, 1983
Filed: Aug 18, 1981
Inventor
Albert F. Kronman
Assignee (at issue)
Hosposable Products 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.