Granted Patent
Utility
US 4,863,287 · App. 07/239,207
Waxed bag with wax-free area
Inventor:
Ronald Marsik
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Aug 30, 1988
Inventor
Ronald Marsik
Assignee (at issue)
Bagcraft Corporation of America
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.