Jean Claude Basset, Guy Belenfant: Method and device for the checking of the number of access attempts to an electronic store, notably that of an integrated circuit of an object such as a credit card or a buyers card. Electronique Marcel Dassault, Pollock Vande Sande & Priddy, March 27, 1984: US04439670 (77 worldwide citation)

An access trial control device for a card, such as a financial or business transaction card or the like, which is inserted in an access terminal for use and carries a confidential code which is compared with an access code type by the user on the terminal. For each access trial the result, acceptanc ...

Jean Pierre Glize, Michel M Gaucher: Verification system, for example for passing through a toll point. Electronique Marcel Dassault, Karl F Ross, Herbert Dubno, February 26, 1985: US04501958 (49 worldwide citation)

A system for verifying an operation in particular one that includes payment, the system comprising at least one terminal (11) and a plurality of portable objects (10) which may be coupled, preferably without contact, to the terminal. The terminal emits repeated interrogation messages suitable for tr ...

Jean Claude Basset, Alain Meinguss: Transistor integrated device, particularly usable for coding purposes. Electronique Marcel Dassault, Pollock Vande Sande & Priddy, October 11, 1983: US04409434 (32 worldwide citation)

In a transaction card such as a credit or payment card provided with an integrated circuit for performing and recording the transaction, communications between the card and an access terminal must be coded so as to prevent fraud attempts. An integrated circuit coding device for coding or decoding a ...

Bouvier Pierre, Schumperli Max: Installation for measurement by radio-electric transmission of a distance between two stations. Electronique Marcel Dassault, Scrivener Parker Scrivener and Clarke, August 19, 1975: US3900873 (19 worldwide citation)

An installation for the measurement of the distance between a first station and a second station by the duration of a radio-electrical transmission going and returning between the two stations, the first station comprising a transmitter the reception from which at the second station controls a trans ...

Alain Meinguss, Bernard Despres: Transistor integrated circuit protected against the analysis, and a card comprising such a circuit. Electronique Marcel Dassault, Pollock Vande Sande & Priddy, February 28, 1984: US04434361 (18 worldwide citation)

A transistor integrated circuit particularly for use in transaction cards such as credit cards or payment cards comprises conductive film zones on the surface of the circuit having a shape and layout which makes it difficult or impossible to determine the layout of the circuit. Additional metal zone ...

Antoine Scillieri, Alain Caillaud: Flat radar antenna employing circular array of slotted waveguides. Electronique Marcel Dassault, Karl F Ross, October 17, 1978: US04121220 (18 worldwide citation)

A flat radar antenna comprises a generally circular array of juxtaposed radiators constituted by slotted waveguides, the array being divided into four quadrants each composed of a multiplicity of groups of radiators. The radiator groups of the entire array are connected to a high-frequency transceiv ...

Michel Revirieux: Electrical contact device for an electronic card processing apparatus. Electronique Marcel Dassault, Pollock Vande Sande & Priddy, October 16, 1984: US04477774 (14 worldwide citation)

An electrical contact device is provided for use in establishing an electrical connection between an access terminal and an electronic card which may be inserted in the access terminal. The access terminal has contact members which are movable in a direction transverse to the surface of the card to ...

Michel Geesen, Jacques Mourant, Daniel P Ludwig: Apparatus for acquiring and collecting radio signals coming from a plurality of stations. Electronique Marcel Dassault, Centre National d Etudes Spatiales, Pollock Vande Sande & Priddy, October 23, 1984: US04479255 (14 worldwide citation)

An apparatus for acquiring and collecting messages aboard a satellite which are transmitted via respective radio-signals over different frequencies from a plurality of beacons comprises a receiver having an adjustable gain control input. An automatic gain control loop is provided for maintaining the ...

Michel Geesen: Counter circuit for counting high frequency pulses using the combination of a synchronous and an asynchronous counter. Electronique Marcel Dassault, Pollock Vande Sande & Priddy, February 12, 1985: US04499589 (13 worldwide citation)

The counter circuit is adapted to counting high frequency pulses and to being read while counting said pulses. It comprises a plurality of pulse counting stages of increasing numerical significance, and read means for reading the states of said stages. Said plurality of pulse counting stages compris ...

Tacussel Maurice: Device for the use in frequency of a short duration electrical signal. Electronique Marcel Dassault, Hane Baxley & Spiecens, May 13, 1975: US3883810 (13 worldwide citation)

Apparatus for storing pulses consisting of packets of high frequency alternating signals including a closed recirculating loop which has a controllable phase shifter therein to insure that the phase of the signals removed from the loop is the same as those introduced into the loop.