Granted Patent
Utility
US 5,098,502 · App. 07/407,498
Method of making a self-erasing, reusable writing surface on packaging structure
Inventor:
Charles A. Smolinski
Patented Case
View Patent ↗
Granted: Mar 24, 1992
Filed: Sep 13, 1989
Inventor
Charles A. Smolinski
Assignee (at issue)
Kraft General Foods, 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.