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George E Chadima Jr, Vadim Laser: Instant portable bar code reader. Norand Corporation, Hill Van Santen Steadman & Simpson, February 11, 1986: US04570057 (224 worldwide citation)

An improved bar code reader unit. The bar code is hand-held and has improved focussing and illumination structure.


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George E Chadima Jr, Vadim Laser: Instant portable bar code reader. Norand Corporation, Neuman Williams Anderson & Olson, January 16, 1990: US04894523 (195 worldwide citation)

In an exemplary embodiment, a hand-held bar code reader has an elongated relatively narrow hand grip portion and an enlarged reader head portion with an extended window of greater width than the hand grip portion. Light energy is directed outwardly through the extended window so as to flood a bar co ...


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George E Chadima Jr, Vadim Laser: Instant portable bar code reader. Intermec IP, McAndrews Held & Malloy, May 22, 2001: US06234395 (183 worldwide citation)

In an exemplary embodiment, a hand held bar code reader has a handle portion and a reader head portion which may be held spaced from a bar code data carrier during a reading operation. Light energy is directed outwardly through a window so as to illuminate a bar code sensing region in front of the w ...


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George E Chadima Jr, Vadim Laser: Instant portable bar code reader. Intermec IP, McAndrews Held & Malloys, December 12, 2000: US06158661 (180 worldwide citation)

In an exemplary embodiment, a hand-held bar code reader has a handle portion and a reader head portion which may be held spaced from a bar code data carrier during a reading operation. Light energy is directed outwardly through a window so as to illuminate a bar code sensing region in front of the w ...


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Vadim Laser: Portable data file readers. Dinsmore & Shohl, January 7, 1997: US05591955 (179 worldwide citation)

The present invention utilizes photosensitive arrays for decoding optically readable portable data files. The invention accomplishes focusing, controlling image exposure, capturing data files, and processing information contained within optically readable portable data files.


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George E Chadima Jr, Vadim Laser: Instant portable bar code reader. Norand Corporation, McAdnrews Held & Malloy, February 22, 1994: US05288985 (175 worldwide citation)

In an exemplary embodiment, a hand-held bar code reader has a handle portion and a reader head portion which may be held spaced from a bar code data carrier during a reading operation. Light energy is directed outwardly through a window so as to illuminate a bar code sensing region in front of the w ...


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George E Chadima Jr, Vadim Laser: Instant portable bar code reader. Intermec IP, McAndrews Held & Malloy, November 30, 1999: US05992750 (156 worldwide citation)

An improved bar code reader unit. The bar code is hand-held and has improved focussing and illumination structure.


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George E Chadima Jr, Vadim Laser: Instant portable bar code reader. Norand Corporation, Hill Van Santen Steadman Chiara & Simpson, August 4, 1981: US04282425 (142 worldwide citation)

A portable instant bar code reader including a hand-held reader unit having a flash type illuminator. The flash type illuminator is triggered to illuminate a bar code label positioned adjacent to a light receiving window of the reader. Reflections from the bar code label are transmitted through the ...


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George E Chadima Jr, Vadim Laser: Instant portable bar code reader. Norand Corporation, McAndrews Held & Malloy, September 1, 1992: US05144119 (135 worldwide citation)

In an exemplary embodiment, a hand-held bar code reader has a handle portion and a reader head portion which may be held spaced from a bar code data carrier during a reading operation. Light energy is directed outwardly through a window so as to illuminate a bar code sensing region in front of the w ...