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:
Jun. 01, 1993
Filed:
Oct. 16, 1991
Applicant:
Inventor:
Alain Bernard, 75015 Paris, FR;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
380 23 ; 380 24 ;
Abstract
Transmitting device of sequences of acoustic signals. The device comprises a transducer, a generator, a micrologic unit, a memory, a battery and a control means. The device transmits sequences that differ from one transmission to the next. The device has application to an electronic payment method by telephone.