04177657 is referenced by 45 patents and cites 14 patents.

An electronic lock system senses codes on a key by means of opto-electronic, magnetic or other electrical means and compares the key code to a code stored internally in a memory. When the key code is equal to its respective stored code the lock activates an electrical clutch operated bolt, and may also change the internal code to a new code.

This invention relates to electronic locks, and is more particularly directed to the provision of an electronic lock which can be operated by a key having a code in the form of an electric parameter or optical parameter thereon.

Title
Electronic lock system
Application Number
667105
Publication Number
4177657
Application Date
November 7, 1977
Publication Date
December 11, 1979
Inventor
Kemal Aydin
Little Falls
NJ, US
Agent
Alfred E Miller
Assignee
Kadex
NY, US
IPC
E05B 49/02
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