Multi-access security system

Details Multi-access security system Multi-access security system

1985-08-22

1987-06-30

Trafton, David L.

Registers

Records

235382, 34082531, G06K 1900

Patent

active

046772847

ABSTRACT:
A security system having a key card with combination codes encoded on two different ends of the key card to allow the user of the key card access to at least two different locks, each lock having different combination codes. The system includes a lock having a multi-level memory for storing combination codes with each level identified by an identification code. Each end of the key has at least one identification code and one combination code.

REFERENCES:
patent: Re29259 (1977-06-01), Sabsay
patent: 3598964 (1971-08-01), Dell et al.
patent: 3781805 (1973-12-01), O'Neal
patent: 4237376 (1980-12-01), Giacomotti et al.
patent: 4602150 (1986-07-01), Nishikawa et al.

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