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. 23, 2002
Filed:
Jun. 23, 1999
Kim Daugaard, Roskilde, DK;
DSC Communications A/S, , DK;
Abstract
A method for ensuring that modules ( ) to be connected to an apparatus comprising a processor of a specific type, includes providing these modules ( ) with a code circuit ( ) capable of outputting one or more code words on request. When a module has been connected to the system, the processor of the apparatus reads one or more of the code words from the code circuit ( ) of the module, compares the read code word or words with reference code words stored in the apparatus ( ), and rejects the module if the read code word or words do not correspond to the reference code words. A large number of different code words are stored in the code circuit ( ) of the specific type, and the code circuit is moreover adapted such that a code word can be output correctly only after the lapse of a prefixed period of time, which is considerably longer than a normal output time determined by the implementation of the code circuit, after a previous output of a code word.