Programmer for contact readable electronic control system and pr

Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements

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Details

34082534, 34082532, 235382, 2353825, 70276, 70277, 70278, G08B 500

Patent

active

058150846

ABSTRACT:
Programmers for an entry control system employ data carriers housing ROM chips. The ROM chips are affixed with unique elemental codes. A keypad addresses the chips in one-to-one correspondence with the keys to transmit the unique elemental codes to the programmable processor of the entry control system.

REFERENCES:
patent: 4148092 (1979-04-01), Martin
patent: 4972182 (1990-11-01), Novik et al.

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