Mechanical key code verification system

Details Mechanical key code verification system Mechanical key code verification system

2011-06-07

2011-06-07

Gall, Lloyd A (Department: 3673)

Locks

Operating mechanism

Key

C070S387000, C070S405000

Reexamination Certificate

active

07954347

ABSTRACT:
A mechanical key code verification system including a mechanical key and a lock apparatus into which the mechanical key is insertable. The mechanical key includes a key body and a key code pattern including a plurality of recessed portions and a plurality of non-recessed portions formed on the at least one plane of the key body, the key code pattern having line symmetry.

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patent: 3090369 (2002-09-01), None
patent: 2004-76375 (2004-03-01), None

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