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. 11, 1995
Filed:
Mar. 31, 1994
Applicant:
Inventors:
Akhteruzzaman, Naperville, IL (US);
Amitava Hazra, Holmdel, NJ (US);
Assignee:
AT&T Corp., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
379 95 ; 380 23 ; 380 28 ; 235380 ; 235382 ; 34082534 ; 379 91 ; 379144 ;
Abstract
This invention relates to a universal authenticator for use with an ordinary telephone station over an ordinary telephone line. The authenticator, which is the size and shape of a credit card, receives a query number by being held against the receiver of the telephone station and receiving audio signals in a receiver. Using its own key, it transforms the received query number into an individualized response number which it transmits via its speaker when the authenticator is held against the microphone of the telephone station.