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:
Mar. 20, 2001
Filed:
Feb. 25, 1998
Jean-Pierre Lafon, Chatillon, FR;
CP8 Transac, Louveciennes, FR;
Abstract
A device for communicating with a portable data medium using at least a power signal (AL) supplied by an electric energy source (,), a control signal (SC,) and a data transmission signal (I/O), comprises an interrupter (,) for interrupting the power signal (AL) to the medium from the source if the portable data medium does not cooperate with the device (,), means (,) for storing electric energy received from the source and for supplying the power signal to the medium when the source does not supply power and a data processor (,) arranged to ensure transmission of the power, control and data transmission signals (AL, SC,, I/O) to the medium according to a predetermined sequencing, as well as for detecting the interruption of the power signal (AL) from the source, then for triggering the interruption of the control and data transmission signals (SC,, I/O) according to the predetermined sequencing during the supply of the power signal from the energy storage mean.