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:
Jul. 03, 2001
Filed:
Jul. 02, 1997
Pascal Coudray, La Chapelle des Fougeretz, FR;
Marie-Hélène Froger, Chateaugiron, FR;
Christophe Truffaut, Rennes, FR;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A device determines a quantity of product present in a reservoir, particularly a quantity of ink in the reservoir (,) of an image forming device, such as a printer (,). The device includes an electrode (,) disposed in contact with the product in the reservoir, a circuit (,) for supplying the electrode with an excitation signal (SE) causing an electromagnetic signal radiated by the product, a receiving antenna (,) for sensing the electromagnetic signal, and a circuit (,) for processing the electromagnetic signal sensed into a signal representing the quantity of product present in the reservoir.