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:
Feb. 17, 2015
Filed:
May. 14, 2009
Heikki Seppä, Espoo, FI;
Hannu Sipola, Espoo, FI;
Anssi Rautiainen, Espoo, FI;
Panu Helistö, Espoo, FI;
Heikki Seppä, Espoo, FI;
Hannu Sipola, Espoo, FI;
Anssi Rautiainen, Espoo, FI;
Panu Helistö, Espoo, FI;
Nicanti Oy, Helsinki, FI;
Abstract
A method and device for reading an electronic code. An alternating electrical signal is brought to the code being measured with the aid of electrodes, and the current or voltage travelling through the electrodes is measured. The real and the imaginary components of the current or correspondingly the voltage are defined. The electrodes, being on an essentially lossless surface, an angle correction is made to the real and imaginary components of the current or the voltage in such a way that substantial changes in the current take place only in the imaginary component of the current or voltage.