Granted Patent
Utility
US 6,424,713 · App. 08/972,835
Cryptographic system with concealed work factor
Inventor:
Eric J. Sprunk
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Nov 18, 1997
Inventor
Eric J. Sprunk
Assignee (at issue)
General Instrument 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.