Patents Assigned to Quantum, Inc.
  • Patent number: 11500975
    Abstract: An authentication method comprising creating electrocardiogram data of users; calculating a similarity between electrocardiogram data of each user and template data created by averaging electrocardiogram data of each user; creating and training a first NNmodel for every user by using similarities between electrocardiogram data of a user and template data of the same user and similarities between electrocardiogram data of a user and template data of another user, and creating and training second NNmodels for users by using similarities between electrocardiogram data of a user and template data of the user and similarities between electrocardiogram data of the user and template data of another user; and executing a first step in which the similarities calculated using electrocardiogram data for authentication of a user to be authenticated and template data are input to the first NNmodel, and executing a second step in which the similarities are input to the second NNmodels.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: November 15, 2022
    Assignees: THE PUBLIC UNIVERSITY CORPORATION, THE UNIVERSITY OF AIZU, SIMPLEX QUANTUM INC.
    Inventors: Wenxi Chen, Ying Chen, Yuji Hamada
  • Patent number: 11489667
    Abstract: A method of correcting gravity-induced error in quantum cryptography system, which is capable of improving accuracy when an optical cable is not installed and photons are transmitted through an artificial satellite, is disclosed. The method performed by an electronic device, comprises receiving a distance (r) to a satellite that receives polarized photon from a sender and transmits the polarized photon to a receiver, receiving an angular momentum per unit mass of the satellite (lobs), and calculating a rotation amount of the polarized photon, which is induced by a warp of space due to gravity by using the distance to the satellite and the angular momentum per unit mass of the satellite (lobs). The rotation 2? of the polarized photon is calculated by the following equation, sin ? ? ? ? ( r ) ? - l obs rr s ? 1 - r s r , wherein ‘rs’ is the Schwarzschild radius of the Earth.
    Type: Grant
    Filed: January 5, 2021
    Date of Patent: November 1, 2022
    Assignee: FIRST QUANTUM INC.
    Inventor: Do Yeol Ahn
  • Publication number: 20220061754
    Abstract: An information processing system is provided to reduce labor of medical staff in determining heart failure stage. The information processing system is configured to execute: a reading step of reading out an input first electrocardiogram including an electrocardiogram of a user; and a determination step of determining a heart failure stage of the user based on the first electrocardiogram and reference information, wherein the reference information is information showing a relationship between the second electrocardiogram, including the electrocardiogram obtained beforehand, in which the heart failure stage has been determined by the physician, and a feature quantity of the heart failure, wherein: the reference information is a learned model in which the feature quantity of the heart failure is learned from the second electrocardiogram, and the learned model is a model that learned a content determined in the determination step and corresponding clinical data.
    Type: Application
    Filed: June 21, 2021
    Publication date: March 3, 2022
    Applicants: THE UNIVERSITY OF TOKYO, SIMPLEX QUANTUM Inc., SIMPLEX QUANTUM Inc.
    Inventors: Katsuhito FUJIU, Issei KOMURO, Eriko HASUMI, Yu SHIMIZU, Yoshihiro MIKAMI, Ryu SAITO, Minoru SHIRATSUCHI, Ying CHEN, Yuji HAMADA
  • Patent number: 10680454
    Abstract: Provided is a power supply circuit that supplies electric power to a biological signal measurement circuit configured to detect, with an electrode set in contact with a human body, a biological signal which is a weak electric signal emitted by the human body. The power supply circuit includes a capacitance element accumulating the electric power, and a circuit switch coupled between the capacitance element and an external power supply for supplying electric power to the capacitance element, and configured to switch, not through a state where the external power supply and the biological signal measurement circuit are electrically coupled, a first state where the capacitance element establishes electrical continuity with the external power supply and is enabled to be charged, and a second state where the capacitance element establishes electrical continuity with the biological signal measurement circuit and is enabled to supply power to the biological signal measurement circuit.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: June 9, 2020
    Assignee: Simplex Quantum Inc.
    Inventors: Hiroshi Nakamura, Yuji Hamada
  • Patent number: 9768579
    Abstract: A laser comprises a first end mirror and a second end mirror defining an optical cavity therebetween, a first gain medium and a second gain medium positioned in the optical cavity, at least one radiation source configured to provide pump radiation to the first and second gain media, wherein the pump radiation comprises a first pump beam directed to be incident on the first gain medium and a second pump beam directed to be incident on the second gain medium so as to stimulate emission of radiation from the first and second gain media thereby establishing a laser beam in the optical cavity and a control apparatus operable to adjust a property of at least one of the first and second pump beams and thereby control a thermal lens of at least one of the first and second gain media so as to substantially remove an instability zone from the power curve of the laser.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: September 19, 2017
    Assignee: LASER QUANTUM INC.
    Inventors: Alan Cox, Jean-Charles Cotteverte
  • Patent number: 9720242
    Abstract: A laser system comprising a laser configured to emit a laser beam wherein the laser beam is linearly polarized in a polarization plane and an optical assembly comprising a partial reflector having a refractive index and comprising a partially reflective surface. The partially reflective surface is arranged to receive the laser beam at an angle of incidence which lies in a plane of incidence and reflect a portion of the laser beam such that the reflected portion is output from the optical assembly. The partially reflective surface is arranged such that the plane of incidence forms a polarization angle with the polarization plane of the laser beam and the laser beam includes a p-polarized component and an s-polarized component.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: August 1, 2017
    Assignee: LASER QUANTUM INC.
    Inventors: Alan Cox, Jean-Charles Cotteverte
  • Patent number: 9203214
    Abstract: A laser system comprising a laser configured to generate a laser beam, a power supply arranged to provide a drive power to the laser, a photodetector arranged to detect the power of the laser beam and provide a detection signal from the power of the laser beam and a feedback loop arranged to form a feedback signal by subtracting a target signal from the detection signal wherein the feedback signal has a high bandwidth, amplify the feedback signal and adjust the drive power according to the amplified feedback signal, thereby reducing noise in the laser beam.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: December 1, 2015
    Assignee: Laser Quantum Inc.
    Inventor: Alan Cox
  • Publication number: 20140173381
    Abstract: A method for reducing the number of error events in a transmitted data stream (34) comprises the steps of (i) generating at least a first most probable sequence (16(1)) and a second most probable sequence (16(2)) with a detection algorithm (12); (ii) determining if a first correctable error occurred in the first most probable sequence (16(1)) with an EDC decoder (14); and (iii) determining if a second correctable error occurred in the second most probable sequence (16(2)) with the EDC decoder (14). Additionally, the steps of determining if a first correctable error occurred and determining if a second correctable error occurred can be performed substantially simultaneously. The method can further comprise computing a plurality of path metrics (42) for the transmitted data stream (34); and selecting a first q smallest path metrics out of the first and second most probable sequences (16(1)), (16(2)) with a Q value selector (44).
    Type: Application
    Filed: December 19, 2012
    Publication date: June 19, 2014
    Applicant: QUANTUM, INC.
    Inventors: Jaewook Lee, Suayb S. Arslan, Turguy Goker
  • Patent number: 8755415
    Abstract: An optical fiber laser or amplifier comprising an optical fiber and a pump radiation source configured to generate pump radiation which is received through an input end of the optical fiber. The optical fiber may include a doped core which is configured to guide the pump radiation and to generate or amplify and guide signal radiation when pump radiation passes through it. The optical fiber laser or amplifier may include a first reflector configured to reflect pump radiation and further comprises a second reflector configured to selectively reflect a portion of pump radiation. The selection of the portion of pump radiation to be reflected by the second reflector depends upon one or more of: the spatial position of the pump radiation, the direction of the pump radiation, and the polarization of the pump radiation.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: June 17, 2014
    Assignee: Laser Quantum Inc.
    Inventor: Alan Cox
  • Publication number: 20120320935
    Abstract: An optical fibre laser or amplifier comprising an optical fibre and a pump radiation source configured to generate pump radiation which is received through an input end of the optical fibre. The optical fibre may include a doped core which is configured to guide the pump radiation and to generate or amplify and guide signal radiation when pump radiation passes through it. The optical fibre laser or amplifier may include a first reflector configured to reflect pump radiation and further comprises a second reflector configured to selectively reflect a portion of pump radiation. The selection of the portion of pump radiation to be reflected by the second reflector depends upon one or more of: the spatial position of the pump radiation, the direction of the pump radiation, and the polarisation of the pump radiation.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 20, 2012
    Applicant: LASER QUANTUM INC.
    Inventor: Alan Cox
  • Patent number: 5585841
    Abstract: A device and method for producing clinically useful hardcopy or archived records from a real-time imaging system includes a controller which monitors variable settings on the system effecting display monitor images. The controller then compensates the signal sent to the hardcopy recorder or archiving device via gamma curve or Look Up Table (LUT) application and/or directly through recorder brightness and contrast controls.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: December 17, 1996
    Assignee: Siemens Quantum, Inc.
    Inventor: William R. Hardin
  • Patent number: 3985601
    Abstract: A method is disclosed for producing an inflatable balloon catheter having an inflatable catheter tip attached to a double lumen catheter shaft to form a smooth, continuous outer surface at the outer juncture of the tip and shaft. The tip is molded and comprises a hollow, thin-walled, cylindrical balloon section that has at least one open end. Mating die members are provided to define a cylindrical mold cavity having inside diameter substantially equal to the inside diameter of the balloon section. The catheter shaft is extruded to have initial outside diameter substantially equal to the outside diameter of the balloon section and, while in a partially cured state, a leading portion of the extruded shaft is stretched to locally reduce its outside diameter. The stretched portion is clamped between the die members in the mold cavity to form a shoulder at a transition between this leading portion and the remainder of the shaft. The entire shaft is then cured.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: October 12, 1976
    Assignee: Quantum, Inc.
    Inventor: Ahmed Panagrossi
  • Patent number: D864396
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: October 22, 2019
    Assignee: Simplex Quantum Inc.
    Inventor: Yoshihiro Mikami
  • Patent number: D890177
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: July 14, 2020
    Assignee: SIMPLEX QUANTUM INC.
    Inventor: Yoshihiro Mikami