Key-lock system

Details Key-lock system Key-lock system

1989-10-23

1991-11-12

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082533, 34082534, 235380, H04B 100, G06K 700

Patent

active

050651552

ABSTRACT:
A key-lock system and method for use in an IC card with a display portion and the like, which is so arranged to render input from a keyboard, to be in an inhibited state by detecting that a plurality of keys for the keyboard were depressed in a predetermined order, and also to render the inhibited state of input from the keyboard, to be in a released state by detecting that the plurality of keys of the keyboard were depressed in another predetermined order.

REFERENCES:
patent: 4667087 (1987-05-01), Quintana
patent: 4670747 (1987-06-01), Borras et al.

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