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Steven E Koenck, Phillip Miller, Arvin D Danielson, Ronald L Mahany, Dennis A Durbin, Keith K Cargin, George E Hanson, Darald R Schultz, Robert G Geers, Darrell L Boatwright, William T Gibbs, Stephen J Kelly: Hand-held data capture system with interchangable modules. Norand, R Lew Gable, McAndrews Held, April 25, 1995: US05410141 (531 worldwide citation)

The disclosure relates to battery powered hand-held data entry terminals wherein a peripheral module may contain an automatically operating full image reader and a wireless communication unit. The reader reads at least one full line of indicia and may comprise a laser bar code scanner or a flash typ ...


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George E Hanson: Hand-held data capture system with interchangable modules including autofocusing data file reader using the slope of the image signal to determine focus. Norand Corporation, Suiter & Associates, February 16, 1999: US05872354 (74 worldwide citation)

The present invention provides a novel hand-held data capture system with interchangeable modules including an autofocusing data file image reader. Several exemplary modules having various features are described. For example the invention teaches an apparatus and method for providing an interchangea ...