04297569 is referenced by 78 patents and cites 28 patents.

This invention relates to electrical key-like devices, to electrical receptacles for use in combination therewith and to electronic circuitry systems, such as computers and other operating circuits, that interface with the key-like devices through the receptacle. The keys contain a microelectronic circuit element, eg., a microelectronic circuit chip or die, having an electrical lead or leads exposed along the length of the key for contacting electrical leads in the receptacle when the key is inserted therein and rotated to a "locked" position. The keys are particularly designed to interface with a processor and program memory system, that is, a computer.

Title
Microelectronic memory key with receptacle and systems therefor
Application Number
6/52773
Publication Number
4297569
Application Date
June 28, 1979
Publication Date
October 27, 1981
Inventor
William P Flies
Frontenac
MN, US
Agent
Schroeder Siegfried Ryan Vidas Steffey & Arrett
Assignee
Datakey
MN, US
IPC
E05B 47/06
G06K 19/00
G06K 7/06
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