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:
Apr. 23, 2002
Filed:
Oct. 06, 1998
Applicant:
Inventor:
Hannu Pirilä, Littoinen, FI;
Assignee:
Nokia Mobile Phones Ltd., Espoo, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M 1/66 ;
U.S. Cl.
CPC ...
H04M 1/66 ;
Abstract
A cellular radio system comprises terminals ( ) arranged to transmit a specific message of a predetermined form at least two times ( ), so that there is a predetermined time-out between the two successive messages of said form. A message of said form, which is received from a terminal, is attached ( ) to a code representing the terminal in order to identify an illegal terminal. Such a terminal is regarded as identified ( ) for which the time between the reception of the two successive messages of said form attached to the code representing the terminal is shorter than said time-out.