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:
Nov. 08, 2005
Filed:
Dec. 24, 2002
Aditya J. Angal, Lexington, KY (US);
Mahesan Chelvayohan, Lexington, KY (US);
Patrick L. Kroger, Versailles, KY (US);
Herman A. Smith, Winchester, KY (US);
Aditya J. Angal, Lexington, KY (US);
Mahesan Chelvayohan, Lexington, KY (US);
Patrick L. Kroger, Versailles, KY (US);
Herman A. Smith, Winchester, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A gauge for detecting the level of ink in a printer's ink reservoir includes: a transmitter antenna adapted to be positioned adjacent to an outer surface of a printer's ink reservoir; a transmitter circuit operatively coupled to the transmitter antenna for generating a radio-frequency signal for transmission by the transmitter antenna; a receiver antenna; a receiver circuit for obtaining at least a portion of the radio-frequency signal received by the receiver antenna; and a processing circuit, operatively coupled to the receiver circuit, and configured to determine an approximate level of ink in the ink reservoir based upon, at least in part, a characteristic of the obtained portion of the radio-frequency signal, such as a voltage level of the obtained portion of the radio-frequency signal.