IP Library Granted Patent US 4,683,968
Granted Patent Utility
US 4,683,968 · App. 06/771,901

System for preventing software piracy employing multi-encrypted keys and single decryption circuit modules

Inventors: Matthew A. Appelbaum, David Lehman, Donald J. Nieglos, Stanley C. Nolte, Michael Oehler
Patented Case View Patent ↗
Granted: Aug 4, 1987 Filed: Sep 3, 1985
Inventors
Matthew A. Appelbaum
David Lehman
Donald J. Nieglos
Stanley C. Nolte
Michael Oehler
Assignee (at issue)
Burroughs, Inc.

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Quick Facts
Patent No.
US 4,683,968
App. No.
06/771,901
Filed
1985-09-03
Granted
1987-08-04
Kind
A