Serial data word processing arrangement

Details Serial data word processing arrangement Serial data word processing arrangement

1987-10-26

1989-11-07

Tarcza, Thomas H.

Boots, shoes, and leggings

G06F 3153

Patent

active

H00007145

ABSTRACT:
A serial data word processing arrangement which can be used as a hand held security access control is disclosed. A microprocessor and electronically erasable and programmable red only memory chips (EEPROM), are used in a novel manner for storing security codes or other data resulting in a device that retains memory even after loss of power.

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patent: 4040025 (1977-08-01), Morrill, Jr. et al.
patent: 4128900 (1978-12-01), Lappington
patent: 4479197 (1984-10-01), Haag et al.
patent: 4514798 (1985-04-01), Lesche et al.
patent: 4623984 (1986-11-01), Yokokawa et al.
patent: 4799144 (1989-01-01), Parruck et al.
"Practical Hardware Details for the 8080, 8085, Z80, and 6800 Microproces Systems", James W. Coffron, 1981, pp. 280-286.

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