The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 1992
Filed:
Sep. 15, 1989
Applicant:
Inventors:
Christopher J Wittensoldner, Cambridge, OH (US);
Denis M Blanford, Cambridge, OH (US);
Assignee:
NCR Corporation, Dayton, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03G / ; G06K / ;
U.S. Cl.
CPC ...
235375 ; 235462 ; 381104 ; 381105 ;
Abstract
A bar code reader has the capability of reading a bar code symbol containing information for causing change in the volume of a speaker associated with said reader, as well as reading merchandise identification symbols commonly associated with items such as merchandise being checked out at a point of sale terminal. The apparatus for controlling the volume of the speaker includes a microprocessor, a digital-to-analog converter, an AC coupler, a reference amplifier, a peak-to-peak amplifier and a push-pull driver.