04652732 is referenced by 144 patents and cites 12 patents.

An apparatus for scanning a bar code affixed to an object and providing an electrical signal indicative of the scanned bar code. The apparatus includes a housing having a base portion and a window portion with the window portion being mounted above a rear section of the base portion. A forward section of the base portion has a flat top surface while the window portion has an optically transmissive window mounted in a side facing the top surface. The region above the top surface and adjacent the window defines a scanning region. Means are mounted within the housing for generating first, second and third scan patterns each comprised of a plurality of substantially parallel spaced apart light scan lines. The first scan pattern scan lines each enter the scanning region through the window at planes each at a predetermined angle from planes parallel to the top surface. The third scan pattern scan lines each enter the scanning region through the window at planes each at a second predetermined angle from planes parallel to the top surface. The second scan pattern scan lines each enter the scanning region through the window at planes each substantially perpendicular to the plane of the top surface. The second scan pattern scan lines are oriented along the window for entering the scanning region between the first and second scan pattern scan lines. Means are including for detecting light reflected from the bar code affixed to an object being scanned within the scanning region back through the window. The means for detecting light detects the reflected light having at least a predetermined intensity and provides an electrical signal in response thereto. Means are included for directing the reflective light from a bar code affixed to an object within the scanning region to the means for detecting light.

Title
Low-profile bar code scanner
Application Number
6/776828
Publication Number
4652732
Application Date
September 17, 1985
Publication Date
March 24, 1987
Inventor
Franklyn G Nickl
San Jose
CA, US
Agent
Gail W Woodward
Assignee
National Semiconductor Corporation
CA, US
IPC
G06K 7/10
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