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:
Oct. 05, 1976
Filed:
Jan. 10, 1975
Leon Cariel, 75017 Paris, FR;
Moise Levy, 75017 Paris, FR;
Hubert Zouizerate, 75019 Paris, FR;
Roger Touati, 95 Argenteuil, FR;
Other;
Abstract
The present invention describes a method and apparatus for selectively transmitting information by radio, without causing congestion of transmission frequency bands, even if the number of users who may be called is relatively great. This object is achieved by ensuring the identification of the users by a decoding matrix provided in each of the receiver devices assigned to each of the users; the pulses characterising a call code are introduced into a shift register and compared with the decoding matrix; when the corresponding binary words are identical, the call signal of the receiver is sent whether it is a sound and/or like call, also the shift register is used to record the details corresponding to the information to be transmitted and then to present said information in alphanumerical form.