Patents by Inventor Alex DIXON

Alex DIXON 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).

  • Publication number: 20200246575
    Abstract: The present invention provides a method and apparatus for reducing condensation in a respiratory circuit during a delivery of humidifying agent into the respiratory circuit. A first amount of humidification agent to a first volume of gas is delivered to a patient respiratory circuit during a patient inhalation cycle or immediately after a patient exhalation cycle, and the humidification agent or the first volume of gas is heated. Condensation is removed from the respiratory circuit at least in part by providing, during a patient exhalation cycle or immediately after a patient inhalation cycle, a second amount of the humidification agent to a second volume of gas being delivered from the gas source to the patient respiratory circuit, the second amount of the humidification agent being significantly less than the first amount of the humidification agent.
    Type: Application
    Filed: April 21, 2020
    Publication date: August 6, 2020
    Inventors: Neil Alex KORNEFF, Paul David DIXON, Christopher M. VARGA
  • Patent number: 10646683
    Abstract: The present invention provides a method for reducing condensed humidifying agent in a humidification system by pulsing a delivery of humidifying agent into a respiratory circuit. During a non-pulsed interval, gas flowing through the respiratory circuit will evaporate the condensed humidifying agent present in the respiratory circuit. The present invention also provides a method and apparatus for delivering humidified gas to a patient, wherein the delivery avoids the problems associated with a stationary water humidifier. In the method, the delivery of humidifying agent is precisely controlled to deliver a flow of humidifying agent to a volume of gas.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: May 12, 2020
    Assignee: Vyaire Medical Consumables LLC
    Inventors: Neil Alex Korneff, Paul David Dixon, Christopher M. Varga
  • Publication number: 20190357542
    Abstract: The invention provides materials and method for controlling pests, in particular, nematodes. The invention also provides compositions comprising biosurfactants as pesticides.
    Type: Application
    Filed: November 16, 2017
    Publication date: November 28, 2019
    Inventors: SEAN FARMER, PAUL S. ZORNER, KEN ALIBEK, MAJA MILOVANOVIC, SHARMISTHA MAZUMDER, TYLER DIXON, ALEX FOTSCH
  • Publication number: 20180359086
    Abstract: According to an embodiment, a quantum communication device includes a corrector and a retransmission controller. The corrector is configured to generate corrected key data by performing error correction on received key data received from a transmitting device through a quantum channel. The retransmission controller is configured to transmit a retransmission request including retransmission target address information to the transmitting device through a control channel when a retransmission request condition is satisfied, and receive retransmission key data corresponding to the retransmission target address information from the transmitting device through the control channel. After receiving the retransmission key data, the corrector replaces corrected key data corresponding to the retransmission target address information with the retransmission key data.
    Type: Application
    Filed: February 16, 2018
    Publication date: December 13, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Alex Dixon, Kazuaki Doi
  • Patent number: 10103818
    Abstract: A transmitting device according to an embodiment include a transmission unit, a storage unit, a cache unit, a reception unit, and a sifting processing unit. The transmission unit transmits a transmission photon to a receiving device. The storage unit stores transmission photon information including transmission timing at which the transmission photon is transmitted, a transmission bit indicated by the transmission photon, and a transmission base of the transmission photon. The cache unit stores, one or more pieces of transmission information including the transmission timing after an elapse of a no-use period of the transmission photon. The reception unit receives, from the receiving device, the reception timing and a reception base of the reception photon. The sifting processing unit performs sifting processing on the transmission bit by making a correlation between the transmission base and the reception base on the basis of the reception timing and the transmission timing.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: October 16, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akira Murakami, Yoshimichi Tanizawa, Alex Dixon
  • Patent number: 10020893
    Abstract: According to an embodiment, a communication device is connected to another communication device through a quantum communication channel and a classical communication channel to share an encryption key. The device includes a photon detector, a measurer, a difference generator, and a transmitter. The photon detector is configured to detect photons transmitted from the other communication device through the quantum communication channel. The measurer is configured to measure time when each photon is detected by the photon detector as time stamp information. The difference generator is configured to generate difference time stamp information as a difference between time obtained by adding particular information to the time indicated by the time stamp information previously measured by the measurer and time indicated by the time stamp information subsequently measured by the measurer.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: July 10, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Akira Murakami, Alex Dixon
  • Publication number: 20180083714
    Abstract: A transmitting device according to an embodiment include a transmission unit, a storage unit, a cache unit, a reception unit, and a sifting processing unit. The transmission unit transmits a transmission photon to a receiving device. The storage unit stores transmission photon information including transmission timing at which the transmission photon is transmitted, a transmission bit indicated by the transmission photon, and a transmission base of the transmission photon The cache unit stores, one or more pieces of transmission information including the transmission timing after an elapse of a no-use period of the transmission photon. The reception unit receives, from the receiving device, the reception timing and a reception base of the reception photon. The sifting processing unit performs sifting processing on the transmission bit by making a correlation between the transmission base and the reception base on the basis of the reception timing and the transmission timing.
    Type: Application
    Filed: February 22, 2017
    Publication date: March 22, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akira MURAKAMI, Yoshimichi TANIZAWA, Alex DIXON
  • Patent number: 9893884
    Abstract: According to an embodiment, a communication device is connected to another communication device through an optical communication path to generate an identical cryptographic key shared among the communication devices. The communication device includes a key sharing unit, a key distilling unit, a measuring unit, and a varying unit. The key sharing unit is configured to generate a shared bit string through quantum key distribution with the another communication device. The key distilling unit is configured to generate the cryptographic key from the shared bit string by a key distillation process. The measuring unit is configured to measure an error rate occurring in a photon string transmitted and received via a photon communication channel. The varying unit is configured to vary, based on the error rate, a communication function by applying a limitation on the optical data communication of an optical data communication channel or by releasing the limitation.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: February 13, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Alex Dixon
  • Publication number: 20170279540
    Abstract: According to an embodiment, a communication device is connected to another communication device through a quantum communication channel and a classical communication channel to share an encryption key. The device includes a photon detector, a measurer, a difference generator, and a transmitter. The photon detector is configured to detect photons transmitted from the other communication device through the quantum communication channel. The measurer is configured to measure time when each photon is detected by the photon detector as time stamp information. The difference generator is configured to generate difference time stamp information as a difference between time obtained by adding particular information to the time indicated by the time stamp information previously measured by the measurer and time indicated by the time stamp information subsequently measured by the measurer.
    Type: Application
    Filed: September 14, 2016
    Publication date: September 28, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Akira Murakami, Alex Dixon
  • Patent number: 9467284
    Abstract: According to an embodiment, a transmitter transmits first transmission key data and second transmission key data as quantum information. The transmitter includes a first privacy amplifier and a second privacy amplifier. The first privacy amplifier generates first secure key data by performing privacy amplification to remove information that has possibly been acquired by an eavesdropper of the first transmission key data on the first transmission key data. The second privacy amplifier generates second secure key data by performing the privacy amplification to remove information that has possibly been acquired by the eavesdropper of the second reception key data on the decoded key data.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: October 11, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Alex Dixon, Yoshimichi Tanizawa
  • Patent number: 9455827
    Abstract: According to an embodiment, a communication apparatus includes a cryptographic key storage, a transmitter, a receiver, and a sharing controller. The cryptographic key storage stores therein one or more cryptographic keys shared with an external device. The transmitter transmits specifying information that specifies at least one of the cryptographic keys to the external device. The receiver receives determination information that indicates a result of determination, which is made by the external device based on the specifying information, on whether the shared cryptographic key is consistent between the apparatus and the external device. When receiving the determination information indicating that the shared cryptographic key is inconsistent between the apparatus and the external device, the sharing controller deletes the cryptographic key specified by the specifying information from the cryptographic key storage.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: September 27, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Hideaki Sato, Ririka Takahashi, Alex Dixon
  • Publication number: 20150270959
    Abstract: According to an embodiment, a communication device is connected to another communication device through an optical communication path to generate an identical cryptographic key shared among the communication devices. The communication device includes a key sharing unit, a key distilling unit, a measuring unit, and a varying unit. The key sharing unit is configured to generate a shared bit string through quantum key distribution with the another communication device. The key distilling unit is configured to generate the cryptographic key from the shared bit string by a key distillation process. The measuring unit is configured to measure an error rate occurring in a photon string transmitted and received via a photon communication channel. The varying unit is configured to vary, based on the error rate, a communication function by applying a limitation on the optical data communication of an optical data communication channel or by releasing the limitation.
    Type: Application
    Filed: March 11, 2015
    Publication date: September 24, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Alex Dixon
  • Patent number: 9059746
    Abstract: According to one embodiment, a transmitter includes a signal dividing unit, a syndrome sending unit, a syndrome receiving unit and a decoding unit. The signal dividing unit divides an original signal into a first signal and a second signal based on a common dividing policy. The syndrome sending unit sends the first syndrome message calculated based on the first signal through a clear channel. The syndrome receiving unit receives a second syndrome message through the clear channel. The decoding unit decodes the second signal by using the second syndrome message to restore a fourth signal, the fourth signal being corresponding to the second signal received by a receiver through a noisy channel.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: June 16, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Alex Dixon, Yoshimichi Tanizawa
  • Publication number: 20150036825
    Abstract: According to an embodiment, a communication apparatus includes a cryptographic key storage, a transmitter, a receiver, and a sharing controller. The cryptographic key storage stores therein one or more cryptographic keys shared with an external device. The transmitter transmits specifying information that specifies at least one of the cryptographic keys to the external device. The receiver receives determination information that indicates a result of determination, which is made by the external device based on the specifying information, on whether the shared cryptographic key is consistent between the apparatus and the external device. When receiving the determination information indicating that the shared cryptographic key is inconsistent between the apparatus and the external device, the sharing controller deletes the cryptographic key specified by the specifying information from the cryptographic key storage.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 5, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi TANIZAWA, Hideaki SATO, Ririka TAKAHASHI, Alex DIXON
  • Publication number: 20150036824
    Abstract: According to an embodiment, a transmitter transmits first transmission key data and second transmission key data as quantum information. The transmitter includes a first privacy amplifier and a second privacy amplifier. The first privacy amplifier generates first secure key data by performing privacy amplification to remove information that has possibly been acquired by an eavesdropper of the first transmission key data on the first transmission key data. The second privacy amplifier generates second secure key data by performing the privacy amplification to remove information that has possibly been acquired by the eavesdropper of the second reception key data on the decoded key data.
    Type: Application
    Filed: July 17, 2014
    Publication date: February 5, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Alex DIXON, Yoshimichi TANIZAWA
  • Publication number: 20140095957
    Abstract: According to one embodiment, a transmitter includes a signal dividing unit, a syndrome sending unit, a syndrome receiving unit and a decoding unit. The signal dividing unit divides an original signal into a first signal and a second signal based on a common dividing policy. The syndrome sending unit sends the first syndrome message calculated based on the first signal through a clear channel. The syndrome receiving unit receives a second syndrome message through the clear channel. The decoding unit decodes the second signal by using the second syndrome message to restore a fourth signal, the fourth signal being corresponding to the second signal received by a receiver through a noisy channel.
    Type: Application
    Filed: August 21, 2013
    Publication date: April 3, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Alex DIXON, Yoshimichi Tanizawa