Granted Patent
Utility
US 4,765,857 · App. 07/035,836
Protective patch for shrinkable bag
Inventor:
Daniel J. Ferguson
Patented Case
View Patent ↗
Granted: Aug 23, 1988
Filed: Apr 8, 1987
Inventor
Daniel J. Ferguson
Assignee (at issue)
W. R. Grace & Co., Cryovac Div.
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.