Granted Patent
Utility
US 5,282,917 · App. 08/014,004
Method of making a product having a concealed message
Inventor:
James J. Danelski
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Feb 5, 1993
Inventor
James J. Danelski
Assignee (at issue)
Ivy Hill Corporation
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.