04899391 is referenced by 41 patents and cites 8 patents.

A system for identifying and matching key blanks when duplicating an original key. A key holder is provided which positions the key horizontally along its longitudinal axis with the key's flat sides in a vertical plane. A lensing subsystem lights and forms an image of the front profile of the key. A video camera converts the light image into an electrical signal which is digitized and stored in computer memory. The computer compares the key image with stored images of known key blanks and signals the locksmith by means of an output subsystem the proper key blank to be used in duplicating the key.

Title
Automatic key identification system
Application Number
7/212342
Publication Number
4899391
Application Date
June 24, 1988
Publication Date
February 6, 1990
Inventor
Robert E Powers Jr
188 Faywood Ave., E. Boston, 02128
MA, US
William J Cimino
325 Rice Ave., Revere, 02151
MA, US
Agent
Lahive & Cockfield
IPC
G06K 9/00
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