Patents Assigned to Ecole Polytechnique
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Patent number: 11248959Abstract: The present disclosure concerns a multi-spectral image printing method. The method includes the steps of:—providing a multi-spectral image;—providing a material;—determining changes in a refractive index value of the material permitting to reproduce the multi-spectral image when the material is illuminated; and—generating the changes in refractive index value in the material.Type: GrantFiled: October 22, 2018Date of Patent: February 15, 2022Assignee: ECOLE POLYTECHNIQUE FÉDÉRALE DE LAUSANNE (EPFL)Inventors: Adam Scholefield, Martin Vetterli, Yves Bellouard, Michalina Pacholska, Gilles Baechler, Arnaud Latty
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Publication number: 20220026379Abstract: MR device (100) comprising a miniaturized magnetic resonance system (101) and a cell culture chamber (502) for the analysis of biological samples of less than about 1000 ?m in size, wherein said device (100) is at least partially covered by a passivation-binding layer (800). The invention also concerns a method for manufacturing said device (100), comprising a step of depositing a thin passivation-binding layer (800) on said system (101) The depositing step is preferably performed through a deposition process selected from chemical vapor deposition and physical vapor deposition.Type: ApplicationFiled: September 20, 2019Publication date: January 27, 2022Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Marco GRISI, Giovanni BOERO, Juergen BRUGGER, Gaurasundar Marc CONLEY
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Patent number: 11232609Abstract: A method of displaying an image on a see-through display comprises: obtaining a first electro-magnetic radiation matrix of radiation intensity values of an object; dividing the first matrix into a second matrix representing a first subset of the radiation intensity values, and a third matrix representing a second subset of the radiation intensity values; generating a first grayscale image with an enhanced contrast representing the first subset of the radiation intensity values from the second matrix; colouring the first grayscale image with a first colourmap to obtain a first colour image; generating a second grayscale image representing the second subset of the radiation intensity values; colouring the second grayscale image with a second colourmap to obtain a second colour image; combining the first colour image and the second colour image; and displaying the combined colour image on the see-through display.Type: GrantFiled: March 15, 2021Date of Patent: January 25, 2022Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Adrien Birbaumer, Martinus Bosch, Jason Racine, Sabine Süsstrunk
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Patent number: 11231323Abstract: A time-resolved hyper-spectral imaging system for imaging a sample, includes a radiation source suitable for illuminating the sample repeatably, a first optical system configured to form an image I of the sample on a spatial light modulator forming a transmission or reflection mask P, a processor connected to the spatial light modulator and configured to make the transmission or reflection mask P vary for each repetition of the illumination, a second optical system suitable for focusing the radiation transmitted or reflected by the spatial light modulator so as to form, in its image focal plane, a partial image S=P·I; the imaging system being wherein it comprises: a dispersive device comprising a slit placed in the image focal plane of the second optical system, the dispersive device being suitable for spatially splitting the various wavelengths of the radiation transmitted or reflected by the spatial light modulator; a streak camera arranged so as to be illuminated by the radiation issuing from the dispersivType: GrantFiled: May 18, 2020Date of Patent: January 25, 2022Assignees: Centre National de la Recherche Scientifique, Institut Photovoltaique d'Ile-de-France, Ecole Polytechnique, Total, EDFInventors: Laurent Lombez, Adrien Bercegol, Daniel Ory
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Patent number: 11226232Abstract: A Multichromatic Calibration (MC) method of at least a spectral sensor which is one of a list comprising at least a spectrometer, a multispectral sensor, a hyperspectral sensor, a spectral camera, a color camera. The method comprises a. generating a plurality of different multichromatic spectra, wherein i. a spectrum from the plurality of different multichromatic spectra contains light intensity measurable by the at least one spectral sensor and by a reference spectral device, and ii. a spectrum from the plurality of different multichromatic spectra contains light centered around at least two different wavelengths and is configured to be integrated during an exposure time of a single measurement from any of the at least one spectral sensor or the reference spectral device; b.Type: GrantFiled: September 26, 2018Date of Patent: January 18, 2022Assignee: ECOLE POLYTECHNIQUE FÉDÉRALE DE LAUSANNE (EPFL)Inventors: Dragos Constantin, Simon De Visscher
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Patent number: 11219703Abstract: The invention relates to a scaffold material comprising a plurality of particles of a highly porous polymeric material, characterized in that said scaffold material becomes a shapeable paste once hydrated. The specific features of the particle material impart a special behavior to the scaffold, which can be easily shaped and even highly reversibly compressed, so that in certain aspects it can, if needed, be injected, said capacity to be shaped being maintained over a high range of hydration conditions. A particular aspect of the invention relates, therefore, to the use of such scaffold material for the manufacturing of shapeable body implants, such as breast implants, to the shapeable body implants themselves as well as to non-invasive methods for using thereof in creating or reconstructing a three-dimensional volume in a subject's body part.Type: GrantFiled: August 18, 2016Date of Patent: January 11, 2022Assignee: École Polytechnique Fédérale de Lausanne (EPFL)Inventors: Amélie Barbara Hildegarde Béduer, Thomas Braschler, Philippe Renaud, Giorgio Pietramaggiori, Saja Scherer
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Patent number: 11211115Abstract: A random access memory array including a plurality of local memory group ways, each local memory group way including, a plurality of local memory groups, each local memory group including, a memory column including a plurality of memory cells, a pair of local bitlines operatively connected to the plurality of memory cells, and a local group periphery including a local bitline multiplexer operatively connected with the pairs of local bitlines of the corresponding local memory group; and a pair of global read bitlines operatively connected to outputs of the plurality of local group peripheries, a global read bitline multiplexer operatively connected to outputs of the plurality of pairs of the global read bitlines from the local memory group ways, and a bitline operational block operatively connected an output of the global read bitline multiplexer.Type: GrantFiled: May 5, 2020Date of Patent: December 28, 2021Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Marco Antonio Rios, William Andrew Simon, Alexandre Sébastien Levisse, Marina Zapater, David Atienza Alonso
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Patent number: 11202911Abstract: The present invention provides a closed-loop system for real-time control of epidural and/or subdural electrical stimulation comprising: means for applying to a subject neuromodulation with adjustable stimulation parameters, said means being operatively connected with a real-time monitoring component comprising sensors continuously acquiring feedback signals from said subject, said signals being neural signals and/or signals providing features of motion of said subject, said system being operatively connected with a signal processing device receiving said feedback signals and operating real-time automatic control algorithms, said signal processing device being operatively connected with said means and providing said means with new stimulation parameters, with minimum delay. The system of the invention improves consistency of walking in a subject with a neuromotor impairment.Type: GrantFiled: March 4, 2019Date of Patent: December 21, 2021Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Gregoire Courtine, Nikolaus Wenger, Eduardo Martin Moraud, Silvestro Micera, Marco Bonizzato
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Patent number: 11204375Abstract: A method for performing synchrophasor estimation of an input signal, whereby the input signal is a sinusoidal power system voltage or current signal, comprising: a. Periodic sampling of a continuous time-domain waveform, consisting of a power system voltage or current signal, to obtain a discrete time-domain function; b. Transforming a discrete time-domain function to a discrete frequency-domain function; c. Estimating from the discrete frequency-domain function the instantaneous parameters of a synchrophasor of the sampled continuous time-domain waveform, the instantaneous parameters comprising a frequency, an amplitude and a phase angle. The method is directed to an improvement of the enhanced IpDFT-based synchrophasor estimation which takes into account interharmonic tones.Type: GrantFiled: June 9, 2017Date of Patent: December 21, 2021Assignee: ECOLE POLYTECHNIQUE FÉDÉRALE DE LAUSANNE (EPFL)Inventors: Asja Derviskadic, Paolo Romano, Mario Paolone
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Patent number: 11200980Abstract: A mechanical teleoperated device for remote manipulation includes a slave unit having a number of slave links interconnected by a plurality of slave joints; an end-effector connected to the slave unit; a master unit having a corresponding number of master links interconnected by a plurality of master joints; and a handle connected to a distal end of the master unit. The device further includes first device arranged to kinematically connect the slave unit with the master unit, second device arranged to kinematically connect the end-effector with the handle, and a mechanical constraint device configured to ensure that one master link of the master unit is guided along its longitudinal axis so that the corresponding slave link of the slave unit always translates along a virtual axis parallel to the longitudinal axis of the guided master link in the vicinity of the remote manipulation when the mechanical teleoperated device is operated.Type: GrantFiled: December 2, 2019Date of Patent: December 14, 2021Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Ricardo Daniel Rita Beira, Lionel Flaction
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Patent number: 11195959Abstract: A perovskite material including an organic-inorganic perovskite structure of formula (I), AnMX3 (I), n being the number of cation A and an integer >4, A being a monovalent cation selected from inorganic cations Ai and/or from organic cations Ao, M being a divalent metal cation or a combination thereof, X being a halide and/or pseudohalide anion or a combination thereof, wherein at least one cation A is selected from organic cations Ao, the inorganic cations Ai are independently selected from Li+, Na+, K+, Rb+, Cs+, or Tl+ and the organic cations Ao are independently selected from ammonium (NH4+), methyl ammonium (MA) (CH3NH3+), ethyl ammonium (CH3CH2NH3)+, formamidinium (FA) (CH(NH2)2+), methylformamidinium (CH3C(NH2)2+), guanidium (C((NH)2)3+), tetramethylammonium ((CH3)4N+), dimethylammonium ((CH3)2NH2+) or trimethylammonium ((CH3)3NH+).Type: GrantFiled: July 3, 2017Date of Patent: December 7, 2021Assignees: Ecole Polytechnique Federale de Lausanne (EPFL), Panasonic CorporationInventors: Michael Saliba, Taisuke Matsui, Konrad Domanski, Jiyoun Seo, Shaik Mohammed Zakeeruddin, Wolfgang Richard Tress, Michael Graetzel
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Publication number: 20210369360Abstract: A novel mechanical system, based on a new cable driven mechanical transmission, able to provide sufficient dexterity, stiffness, speed, precision and payload capacity to actuate multi-DOF micro-manipulators. Besides the possibility of being used in several articulated surgical instruments and robotic systems for surgery or other applications involving remote manipulation, it enables the design of a novel fully mechanical surgical instrument, which offer the advantages of: conventional laparoscopy (low cost, tactile feedback, high payload capacity) combined with the advantages of single port surgery (single incision, starless surgery, navigation through several quadrants of the abdominal cavity) and robotic surgery (greater degrees of freedom, short learning curve, high stiffness, high precision, increased intuition).Type: ApplicationFiled: July 26, 2021Publication date: December 2, 2021Applicant: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Ricardo Daniel Rita BEIRA, Reymond CLAVEL, Hannes BLEULER
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Patent number: 11187652Abstract: A method of investigating a sample (1) having an absorption within an infrared spectral range of interest, comprises the steps of creating measuring light (2) with a light source device (10), wherein the measuring light (2) includes wavelengths covering the infrared spectral range, directing the measuring light (2) through the sample (1) to a detector device (20) with a plurality of detector units (21), each of which comprising an infrared sensitive sensor section (22) and an associated metamaterial resonator section (23) having a specific spectral resonance line (3), wherein the spectral resonance lines (3) of the resonator sections (23) have different frequencies within the infrared spectral range, wherein the measuring light (2) is transmitted through the sample (1) to the resonator sections (23) and subsequently sensed by the sensor sections (22), wherein an output of each of the sensor sections (22) depends on the absorption of the sample (1) at the frequency of the spectral resonance line (3) of the assType: GrantFiled: April 27, 2018Date of Patent: November 30, 2021Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Hatice Altug Yanik, Andreas Tittl, Aleksandrs Leitis
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Patent number: 11179033Abstract: A method for imaging a tissue of an eye, the method including the steps of providing oblique illumination to the eye by a plurality of light emitting areas of a light delivery device, the plurality of light emitting areas being independently controllable and arranged to direct light towards at least one of a retina and an iris of the eye, causing an output beam from light backscattered from the at least one of the retina and the iris by the oblique illumination, capturing the output beam with an imaging system to provide a sequence of images of a fundus of the eye, and retrieving a phase and absorption contrast image from the sequence of images of the fundus, wherein the sequence of images of the fundus of the step of capturing is obtained by sequentially turning on one or more of the plurality of light emitting areas at a time in the step of providing the oblique illumination.Type: GrantFiled: May 12, 2017Date of Patent: November 23, 2021Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Timothé Laforest, Dino Carpentras, Christophe Moser, Mathieu Künzi, Francine Behar-Cohen
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Patent number: 11179722Abstract: Method for handling at least one first microdrop and at least one second microdrop in a microfluidic system including a capillary trap that has a first trapping zone and a second trapping zone, the method including steps consisting of: (i) trapping the first microdrop in the first trapping zone, and (ii) trapping the second microdrop in the second trapping zone, the first and the second trapping zone being arranged such that the first and the second microdrops are in contact with each other, the first and the second trapping zones being adapted such that the trapping forces returned to one of the microdrops are different.Type: GrantFiled: September 29, 2017Date of Patent: November 23, 2021Assignees: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Charles Baroud, Raphaël Tomasi
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Patent number: 11172885Abstract: A medical device including an electric measurement circuit, in which are connected at least two sensors the impedance of which varies as a function of a sensed physical parameter, a source of electrical power for powering the electric measurement circuit, an antenna for emitting an electromagnetic field as a function of the impedance of the electric measurement circuit, each of the sensors being associated with a switch for short circuiting the sensor in the measurement circuit, the medical device further including a system for controlling the switches in order successively to command the opening or closing of the switches in determined configurations. The medical device may notably be able to be applied to the human body or implanted in the human body.Type: GrantFiled: October 2, 2015Date of Patent: November 16, 2021Assignees: Centre National de la Recherche Scientifique, Ecole Polytechnique, Ecole Normale Superieure de CachanInventors: Abdul Barakat, Franz Bozsak, Yvan Eric Bonnassieux, Bruno Le Pioufle, Olivier Francais, Bruno Carreel
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Patent number: 11177440Abstract: The present invention provides a method for depositing an organic-inorganic perovskite, the method comprising the step of depositing a perovskite precursor solution comprising one or more organic cation, wherein said precursor solution preferably deposited by inkjet printing. The method is particularly useful in the manufacture of perovskite solar cells. For depositing the perovskite, a perovskite precursor solution or ink is preferably used, which comprises an organic cation carrying an anchoring group, such as 5-ammonium valeric acid. Surprisingly, the presence of the latter compound renders the precursor solutions stable and suitable for inkjet printing.Type: GrantFiled: August 2, 2017Date of Patent: November 16, 2021Assignees: AALTO UNIVERSITY FOUNDATION, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL), SOLARONIX S.AInventors: Syed Ghufran Hashmi, Merve Ozkan, David Martineau, Xiong Li, Shaik Mohammed Zakeeruddin, Michael Graetzel
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Patent number: 11175392Abstract: The present invention concerns a pulse wave image reconstruction method to be used for example in ultrasound imaging. The proposed method is based on an image measurement model and its adjoint operator. The proposed method introduces matrix-free formulations of the measurement model and its adjoint operator. The proposed method has the advantage that the reconstructed image has a very high quality and that it can be reconstructed quickly.Type: GrantFiled: August 21, 2018Date of Patent: November 16, 2021Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Adrien Besson, Dimitris Perdios, Marcel Arditi, Jean-Philippe Thiran
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Publication number: 20210341436Abstract: The present invention concerns an array processing image reconstruction method comprising: receiving a set of echo waveforms as measurements from the object of interest; defining a measurement model linking an unknown image of the object to the measurements; defining a data fidelity functional using the measurement model; defining a regularisation functional using a trained non-linear mapping, the regularisation functional comprising prior knowledge about the unknown image; defining an optimisation problem involving the data fidelity functional and the regularisation functional for obtaining a first image estimate of the unknown image; and solving the optimisation problem to obtain the first image estimate.Type: ApplicationFiled: August 29, 2019Publication date: November 4, 2021Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Dimitris PERDIOS, Adrien BESSON, Florian MARTINEZ, Marcel ARDITI, Jean-Philippe THIRAN
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Patent number: 11164025Abstract: The present invention concerns a method for an artificial neural network to confirm the recognition of handwritten characters produced by a user. The method comprising: training the artificial neural network with a training data set comprising a first set of characters; collecting handwritten characters of a second set of characters produced by the user; and analysing the collected characters of the second set of characters by using the artificial neural network to obtain a first set of probability values comprising character specific probability values for the collected characters, each character specific probability value indicating the probability that the collected character has been correctly interpreted. The analysis considers at least the manner how the collected characters are handwritten and the appearance of the collected characters to obtain the character specific probability values. The invention also relates to a corresponding data processing apparatus.Type: GrantFiled: November 24, 2017Date of Patent: November 2, 2021Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Konrad Zolna, Thibault Asselborn, Wafa Johal