IP Library › Granted Patent US 4,333,090
Granted Patent Utility
US 4,333,090 · App. 06/146,404

Secure keyboard input terminal

Inventor: Steven B. Hirsch
Patented Case View Patent ↗
Granted: Jun 1, 1982 Filed: May 5, 1980
Inventor
Steven B. Hirsch

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Quick Facts
Patent No.
US 4,333,090
App. No.
06/146,404
Filed
1980-05-05
Granted
1982-06-01
Kind
A