Granted Patent
Utility
US 5,406,627 · App. 07/999,757
Digital data cryptographic system
Inventors:
John R. Thompson, C. J. Hunting, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Dec 28, 1992
Inventors
John R. Thompson
C. J. Hunting
William L. Phipps
Steven J. Raynesford
Philip H. Rittmueller
Assignee (at issue)
NEC Home Electronics, 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.