Granted Patent
Utility
US 5,265,159 · App. 07/902,607
Secure file erasure
Inventor:
Kenneth Kung
Patented Case
View Patent ↗
Granted: Nov 23, 1993
Filed: Jun 23, 1992
Inventor
Kenneth Kung
Assignee (at issue)
Hughes Aircraft Company
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.