05949052 is referenced by 290 patents and cites 5 patents.

The present invention relates to a system for sensing the presence of an object in the field of view of an imaging assembly of a stationary position optical reader. The system includes a specialized symbol disposed in a stationary position in relation to the imaging assembly of a specially configured optical reader. An optical reader according to the invention is configured to determine whether an object is in the field of view of the imaging assembly and determining whether features of the specialized symbol are present in the image information.

Title
Object sensor system for stationary position optical reader
Application Number
8/953199
Publication Number
5949052
Application Date
October 17, 1997
Publication Date
September 7, 1999
Inventor
Robert M Hussey
Liverpool
NY, US
Andrew Longacre Jr
Skaneateles
NY, US
Agent
Wall Marjama Bilinski & Burr
Assignee
Welch Allyn
NY, US
IPC
G06K 7/10
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