Patents by Inventor Ngoc-Chau Bui
Ngoc-Chau Bui has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7423531Abstract: An electronic label (1) is used to mark a container (2, 6). The label includes a radio identification element (RFID, Radio Frequency Identification Device) (10, 11) and which is intended to be placed inside the container (2, 6). The electronic label (1) is specifically adapted to the position thereof inside the container (2, 6). Using the present arrangement, the electronic label (1) is inaccessible and, thus, difficult to destroy or change. In this way, the container (2, 6) is marked in a reliable, even permanent, manner, thereby enabling the information contained on the label (1) to be used effectively to combat theft, forgery or counterfeiting and to manage a deposit system.Type: GrantFiled: August 7, 2003Date of Patent: September 9, 2008Assignee: MBBS SAInventors: Ngoc Chau Bui, Alain Maillard
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Patent number: 7240838Abstract: A reader for identifying passive transponders includes an antenna for receiving a first signal (Tx) from the reader and for transmitting a second signal (Rx). The reader includes: a time base generating a sinusoidal signal, a control circuit, a modulator for transmitting to the control circuit data to modulate the sinusoidal signal so as to generate a signal carrying commands which, when it is received by the antenna of the transponder, forms the first signal (Tx), a demodulator, a decoder, a communication interface and an antenna. The demodulator, which is connected to the antenna to receive the second signal (Rx), includes two multipliers, one being of the inverter type, and an adder designed to combine the data derived from the multipliers. A system including first and second devices that communicate by way of a modulated transmitted signal is also described.Type: GrantFiled: December 12, 2005Date of Patent: July 10, 2007Assignee: MBBS Holding S.A.Inventors: Ngoc-Chau Bui, Christian Werner, Yves Gaudenzi, Martial Benoit, Vincent Cassi, Christian Mirus, Jean-Daniel Chatelain, Jacques Kowalczuk
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Publication number: 20060091213Abstract: A reader for identifying passive transponders includes an antenna for receiving a first signal (Tx) from the reader and for transmitting a second signal (Rx). The reader includes: a time base generating a sinusoidal signal, a control circuit, a modulator for transmitting to the control circuit data to modulate the sinusoidal signal so as to generate a signal carrying commands which, when it is received by the antenna of the transponder, forms the first signal (Tx), a demodulator, a decoder, a communication interface and an antenna. The demodulator, which is connected to the antenna to receive the second signal (Rx), includes two multipliers, one being of the inverter type, and an adder designed to combine the data derived from the multipliers. A system including first and second devices that communicate by way of a modulated transmitted signal is also described.Type: ApplicationFiled: December 12, 2005Publication date: May 4, 2006Applicant: MBBS HOLDING S.A.Inventors: Ngoc-Chau Bui, Christian Werner, Yves Gaudenzi, Martial Benoit, Vincent Cassi, Christian Mirus, Jean-Daniel Chatelain, Jacques Kowalczuk
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Patent number: 7014111Abstract: The invention concerns a reader (10) for identifying passive transponders (12) comprising an antenna for receiving a first signal (Tx) from the reader and for transmitting a second signal (Rx). The reader comprises: a time base (54) generating a sinusoidal signal, a control circuit (64), a modulator (56) for transmitting to the control circuit (64) data to modulate the sinusoidal signal so as to generate a signal carrying commands which, when it is received by the antenna of said transponder, forms said first signal (Tx), a demodulator (58), a decoder (60), a communication interface (62) and an antenna (14). The demodulator (60), which is connected to the antenna (14) to receive the second signal (Rx), comprises two multipliers (76, 78), one (78) being of the inverter type, and an adder (70) designed to combine the data derived from the multipliers (76, 78).Type: GrantFiled: July 17, 2001Date of Patent: March 21, 2006Assignee: MBBS Holding S.A.Inventors: Ngoc-Chau Bui, Christian Werner, Yves Gaudenzi, Martial Benoit, Vincent Cassi, Christian Mirus, Jean-Daniel Chatelain, Jacques Kowalczuk
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Patent number: 6891475Abstract: The invention concerns a radio-frequency transponder (12) for contact-free identification with a reader (10), comprising: an antenna (24), an analog circuit (25) including a capacitor (32) an AC-DC converter (34), a modulator (40) and a demodulator (38), a logic control circuit (26), a storage unit (27). Said transponder (12) is designed such that: the antenna (24) and the capacitor (32) form together a resonant circuit, the clock extractor (36) processes the first signal (Tx) to extract therefrom a clock signal addressed to said modulator (38) as long as the voltage of said signal (Tx) exceeds a first threshold value, the converter (34) transforms the first signal (Tx) into a rectified signal, to power the transponder (12). The performances of the transponder, and more particularly energy recuperation and data transmission rate, are improved by the fact that the analog circuit comprises two clock extractors, one of low level type (35), the other of the high level type (36).Type: GrantFiled: July 17, 2001Date of Patent: May 10, 2005Assignee: MBBS Holding S.A.Inventors: Ngoc-Chau Bui, Christian Werner, Yves Gaudenzi, Martial Benoit, Vincent Cassi, Christian Mirus, Jean-Daniel Chatelain, Jacques Kowalczuk
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Publication number: 20040178265Abstract: The invention concerns a reader (10) for identifying passive transponders (12) comprising an antenna for receiving a first signal (Tx) from the reader and for transmitting a second signal (Rx). The reader comprises: a time base (54) generating a sinusoidal signal, a control circuit (64), a modulator (56) for transmitting to the control circuit (64) data to modulate the sinusoidal signal so as to generate a signal carrying commands which, when it is received by the antenna of said transponder, forms said first signal (Tx), a demodulator (58), a decoder (60), a communication interface (62) and an antenna (14). The demodulator (60), which is connected to the antenna (14) to receive the second signal (Rx), comprises two multipliers (76, 78), one (78) being of the inverter type, and an adder (70) designed to combine the data derived from the multipliers (76, 78).Type: ApplicationFiled: June 30, 2003Publication date: September 16, 2004Inventors: Ngoc-Chau Bui, Christian Werner, Yves Gaudenzi, Martial Benoit, Vincent Cassi, Christian Mirus, Jean-Daniel Chatelain, Jacques Kowalczuk
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Publication number: 20040155755Abstract: The invention concerns a radio-frequency transponder (12) for contact-free identification with a reader (10), comprising: an antenna (24), an analog circuit (25) including a capacitor (32) an AC-DC converter (34), a modulator (40) and a demodulator (38), a logic control circuit (26), a storage unit (27). Said transponder (12) is designed such that: the antenna (24) and the capacitor (32) form together a resonant circuit, the clock extractor (36) processes the first signal (Tx) to extract therefrom a clock signal addressed to said modulator (38) as long as the voltage of said signal (Tx) exceeds a first threshold value, the converter (34) transforms the first signal (Tx) into a rectified signal, to power the transponder (12). The performances of the transponder, and more particularly energy recuperation and data transmission rate, are improved by the fact that the analog circuit comprises two clock extractors, one of low level type (35), the other of the high level type (36).Type: ApplicationFiled: June 30, 2003Publication date: August 12, 2004Inventors: Ngoc-Chau Bui, Christian Werner, Yves Gaudenzi, Martial Benoit, Vincent Cassi, Christian Mirus, Jean-Daniel Chatelain, Jacques Kowalczuk