Patents by Inventor Vojkan Mihajlovic
Vojkan Mihajlovic 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: 11911136Abstract: A device for calculating a subject's cardiac pulse transit or arrival time information is configured to receive an electronic audio signal with information indicative of a human voice signal and a primary cardiac pulse signal; generate a power spectral profile of a section of the electronic audio signal, and detect a fundamental frequency (F0) of the generated power spectral profile; generate a denoised audio signal; generate a time-domain intermediate signal that captures frequency, amplitude and/or phase of the denoised audio signal; detect at least one intermediate signal fiducial point, within a human cardiac band, in the intermediate signal; detect at least one primary cardiac pulse fiducial point, within a human cardiac band, in the primary cardiac pulse signal; calculate pulse transit time or pulse arrival time information between the at least one detected primary cardiac signal fiducial point and the at least one detected intermediate signal fiducial point.Type: GrantFiled: June 15, 2020Date of Patent: February 27, 2024Assignee: IMEC NederlandInventors: Carlos Agell, Evelien Hermeling, Vojkan Mihajlovic
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Publication number: 20240017074Abstract: A device for stimulating a nerve of a living being comprises: a stimulation generating unit; a first pair of electrodes, a second pair of electrodes, and a third pair of electrodes configured to be arranged in a first, second, and third location, respectively, in relation to the nerve; wherein the stimulation generating unit is configured to generate a first waveform comprising a first frequency; a second waveform comprising a second frequency, and a third waveform comprising a third frequency to the first, second, and third pairs of electrodes, respectively; wherein the first and second frequencies define a beat frequency and the third frequency is related to the beat frequency by an integer number, wherein the stimulation generating unit is configured to output the first, second, and third waveforms for causing interferential stimulation in the nerve.Type: ApplicationFiled: July 6, 2023Publication date: January 18, 2024Inventors: Vojkan MIHAJLOVIC, Mark FICHMAN
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Publication number: 20230364428Abstract: A device for stimulating a nerve comprising: a first stimulation generating unit configured to generate and output a first intermittent current waveform comprising a sequence of first pulses to a first pair of electrodes; a second stimulation generating unit configured to generate and output a second intermittent current waveform comprising a sequence of second pulses to a second pair of electrodes; wherein the first and second intermittent current waveform have a difference in frequency so as to stimulate the nerve using interferential stimulation based on interference between the first and second intermittent current waveform; and a control unit configured to control the interferential stimulation and synchronize the first and the second stimulation generating unit.Type: ApplicationFiled: May 15, 2023Publication date: November 16, 2023Inventors: Mark FICHMAN, Vojkan MIHAJLOVIC
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Patent number: 11721358Abstract: A device for calculating cardiovascular heartbeat information is configured to receive an electronic audio signal with information representative of a human voice signal in the time-domain, the human voice signal comprising a vowel audio sound of a certain duration and a fundamental frequency; generate a power spectral profile of a section of the electronic audio signal, and detect the fundamental frequency (F0) in the generated power spectral profile; filter the received audio signal within a band around at least the detected fundamental frequency (F0) and thereby generating a denoised audio signal; generate a time-domain intermediate signal that captures frequency, amplitude and/or phase of the denoised audio signal; detect and calculate heartbeat information within a human cardiac band in the intermediate signal.Type: GrantFiled: June 17, 2020Date of Patent: August 8, 2023Assignee: Stichting IMEC NederlandInventors: Carlos Agell, Evelien Hermeling, Vojkan Mihajlovic
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Patent number: 11684772Abstract: An electrode (10) for transcranial current stimulation is provided. The electrode (10) comprises at least two pins (11a, 11b) for contacting the skin of a living or human being, and a current delivering unit (12) connected to the at least two pins (11a, 11b). The current delivering unit (12) is configured to estimate the corresponding range of the respective contact impedance with respect to the skin for each of the at least two pins (11a, 11b) or to analyze the corresponding level of the respective contact impedance with respect to the skin for each of the at least two pins (11a, 11b). The current delivering unit (12) is configured to distribute a desired current over all of the at least two pins (11a, 11b) or to select a set of the at least two pins (11a, 11b) for delivering a set of partial currents in order to achieve the desired current.Type: GrantFiled: May 12, 2021Date of Patent: June 27, 2023Assignee: STICHTING IMEC NEDERLANDInventor: Vojkan Mihajlovic
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Publication number: 20230181902Abstract: A method for controlling a stimulation signal for brain stimulation comprises: transmitting a trigger signal for triggering a stimulation generator to output a high frequency synchronization signal exhibiting periodical modifications; receiving a measurement signal representing brain activity comprising neural oscillations and a response to the high frequency synchronization signal; determining adjustment of a phase of the stimulation signal based on a phase difference between the neural oscillations and the modifications of the high frequency synchronization signal; and transmitting a phase information signal for providing information of an adjusted phase of the stimulation signal to be used by the stimulation generator.Type: ApplicationFiled: December 5, 2022Publication date: June 15, 2023Inventors: Ilkka KOSUNEN, Vojkan MIHAJLOVIC
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Publication number: 20210353931Abstract: An electrode (10) for transcranial current stimulation is provided. The electrode (10) comprises at least two pins (11a, 11b) for contacting the skin of a living or human being, and a current delivering unit (12) connected to the at least two pins (11a, 11b). The current delivering unit (12) is configured to estimate the corresponding range of the respective contact impedance with respect to the skin for each of the at least two pins (11a, 11b) or to analyze the corresponding level of the respective contact impedance with respect to the skin for each of the at least two pins (11a, 11b). The current delivering unit (12) is configured to distribute a desired current over all of the at least two pins (11a, 11b) or to select a set of the at least two pins (11a, 11b) for delivering a set of partial currents in order to achieve the desired current.Type: ApplicationFiled: May 12, 2021Publication date: November 18, 2021Inventor: Vojkan MIHAJLOVIC
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Publication number: 20210353200Abstract: An electrode (10) for potential acquisition of a surface is provided. The electrode (10) comprises at least two pins (11a, 11b, 21) for contacting the surface, and a local signal processing unit (12) connected to at least one (11a, 11b) of the pins (11a, 11b, 21). The local signal processing unit (12) is configured to perform signal processing operations with respect to the corresponding surface potential signal of the respective at least one pin (11a, 11b). In addition to this, the local signal processing unit (12) is directly integrated into the electrode (10).Type: ApplicationFiled: May 12, 2021Publication date: November 18, 2021Inventors: Jiawei XU, Vojkan MIHAJLOVIC
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Publication number: 20200390348Abstract: A device for calculating a subject's cardiac pulse transit or arrival time information is configured to receive an electronic audio signal with information indicative of a human voice signal and a primary cardiac pulse signal; generate a power spectral profile of a section of the electronic audio signal, and detect a fundamental frequency (F0) of the generated power spectral profile; generate a denoised audio signal; generate a time-domain intermediate signal that captures frequency, amplitude and/or phase of the denoised audio signal; detect at least one intermediate signal fiducial point, within a human cardiac band, in the intermediate signal; detect at least one primary cardiac pulse fiducial point, within a human cardiac band, in the primary cardiac pulse signal; calculate pulse transit time or pulse arrival time information between the at least one detected primary cardiac signal fiducial point and the at least one detected intermediate signal fiducial point.Type: ApplicationFiled: June 15, 2020Publication date: December 17, 2020Inventors: Carlos Agell, Evelien Hermeling, Vojkan Mihajlovic
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Publication number: 20200395040Abstract: A device for calculating cardiovascular heartbeat information is configured to receive an electronic audio signal with information representative of a human voice signal in the time-domain, the human voice signal comprising a vowel audio sound of a certain duration and a fundamental frequency; generate a power spectral profile of a section of the electronic audio signal, and detect the fundamental frequency (F0) in the generated power spectral profile; filter the received audio signal within a band around at least the detected fundamental frequency (F0) and thereby generating a denoised audio signal; generate a time-domain intermediate signal that captures frequency, amplitude and/or phase of the denoised audio signal; detect and calculate heartbeat information within a human cardiac band in the intermediate signal.Type: ApplicationFiled: June 17, 2020Publication date: December 17, 2020Inventors: Carlos Agell, Evelien Hermeling, Vojkan Mihajlovic
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Patent number: 10758179Abstract: The present invention relates to a stress-measuring system for determining a level of stress of a user, in particular for monitoring an upcoming burnout, the system (10) comprising: an alarm clock (12) for initiating an alarm at an arbitrary preset time, wherein the system (10) comprises an interface (14) for switching off the alarm; a vital sign sensor (16) for measuring a first vital sign of the user while the user operates the interface (14); and a processing unit (18) for determining the level of stress of the user based on the sensed first vital sign.Type: GrantFiled: October 16, 2013Date of Patent: September 1, 2020Assignee: Koninklijke Philips N.V.Inventors: Alphons Antonius Maria Lambertus Bruekers, Murtaza Bulut, Vojkan Mihajlovic, Martin Ouwerkerk, Joanne Henriette Desiree Monique Westerink
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Patent number: 10758149Abstract: The present invention relates to a neurofeedback system that comprises an electrode (2, 2?, 2?) for contacting skin (6) of a user (7) for measuring a biofeedback signal (9) of the user (7), a first signal processing unit (3) for determining a signal characteristic (11) of the measured biofeedback signal (9), wherein the signal characteristic (11) represents a neurofeedback, a second signal processing unit (4) for determining a biofeedback signal quality (12) of the measured biofeedback signal (9) by extracting a signal feature of the measured biofeedback signal (9) and calculating a probability of a measurement error for said signal feature, which probability represents the biofeedback signal quality (12), and a feedback unit (5) for providing feedback to the user, wherein the feedback comprises the neurofeedback and a feedback about the biofeedback signal quality (12).Type: GrantFiled: August 12, 2013Date of Patent: September 1, 2020Assignee: KONINKLIJKE PHILIPS N.V.Inventor: Vojkan Mihajlovic
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Patent number: 10481864Abstract: The present disclosure relates to a method for emotion-triggered capturing of audio and/or image data by an audio and/or image capturing device. The method includes receiving and analyzing a time-sequential set of data including first physiological data representing a first physiological parameter corresponding to a first person, a second physiological data representing a second physiological parameter corresponding to a second person, and voice audio data including a voice of at least one of the first and the second person, to determine whether a simultaneous change of emotional state of a first person and a second person occurs and transmitting a trigger signal to the capturing device. The present disclosure also relates to a corresponding apparatus and a system comprising the apparatus.Type: GrantFiled: September 27, 2017Date of Patent: November 19, 2019Assignee: Stichting IMEC NederlandInventors: Vojkan Mihajlovic, Stefano Stanzione, Ulf Grossekathoefer
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Patent number: 10061891Abstract: A system and method for the analysis of biopotential signals using motion artifact removal techniques is disclosed. The system includes a motion classification module configured to receive at least one biopotential signal and at least one reference secondary input signal. The motion classification module performs motion artifact classification for determining motion meta-information, comprising a type and/or severity indication about motion phenomena causing artifacts in the biopotential signal. The motion classification module communicates motion meta-information to a motion artifact reduction module configured to remove motion artifacts from the biopotential signal based on the information received from the motion classification module.Type: GrantFiled: April 14, 2014Date of Patent: August 28, 2018Assignee: Stitching IMEC NederlandInventors: Bernard Grundlehner, Vojkan Mihajlovic
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Publication number: 20180150651Abstract: A system for generating an access control policy comprises a user interface for enabling a user to indicate a topic and a set of permissions. A document analyzer analyzes the content of a plurality of documents to find a set of documents relating to the topic. A property finder analyzes the content of a plurality of documents to find at least one distinguishing property of documents relating to the topic. A document selector selects the set of documents, based on the distinguishing property. An associating subsystem associates the set of permissions with the set of documents to obtain an access control policy.Type: ApplicationFiled: January 9, 2018Publication date: May 31, 2018Inventors: Milan Petkovic, Vojkan Mihajlovic
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Publication number: 20180088903Abstract: The present disclosure relates to a method for emotion-triggered capturing of audio and/or image data by an audio and/or image capturing device. The method includes receiving and analyzing a time-sequential set of data including first physiological data representing a first physiological parameter corresponding to a first person, a second physiological data representing a second physiological parameter corresponding to a second person, and voice audio data including a voice of at least one of the first and the second person, to determine whether a simultaneous change of emotional state of a first person and a second person occurs and transmitting a trigger signal to the capturing device. The present disclosure also relates to a corresponding apparatus and a system comprising the apparatus.Type: ApplicationFiled: September 27, 2017Publication date: March 29, 2018Applicant: Stichting IMEC NederlandInventors: Vojkan Mihajlovic, Stefano Stanzione, Ulf Grossekathoefer
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Patent number: 9892279Abstract: A system for generating an access control policy comprises a user interface (1) for enabling a user to indicate a topic (10) and a set of permissions (15). A document analyzer (2) analyzes the content of a plurality of documents (11) to find a set of documents (13) relating to the topic (10). A property finder (5) analyzes the content of a plurality of documents (11) to find at least one distinguishing property (12) of documents relating to the topic (10). A document selector (6) selects the set of documents (13), based on the distinguishing property (12). An associating subsystem (3) associates the set of permissions (15) with the set of documents (13) to obtain an access control policy (4).Type: GrantFiled: December 14, 2011Date of Patent: February 13, 2018Assignee: Koninklijke Philips N.V.Inventors: Milan Petkovic, Vojkan Mihajlovic
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Patent number: 9498148Abstract: An electrode for biopotential sensing comprising a main electrode base and at least a plurality of contact pins protruding from the main electrode base and configured to make contact with a subject's skin. Each of the first plurality of contact pins comprises at least one conductive mesh having an elongated pillar shape. A headset or biopotential monitoring system comprising such an electrode for biopotential sensing.Type: GrantFiled: December 17, 2015Date of Patent: November 22, 2016Assignee: Stichting IMEC NederlandInventors: Jozef Franciscus Maria Oudenhoven, Vojkan Mihajlovic, Marcel Zevenbergen
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Publication number: 20160174859Abstract: An electrode for biopotential sensing comprising a main electrode base and at least a plurality of contact pins protruding from the main electrode base and configured to make contact with a subject's skin. Each of the first plurality of contact pins comprises at least one conductive mesh having an elongated pillar shape. A headset or biopotential monitoring system comprising such an electrode for biopotential sensing.Type: ApplicationFiled: December 17, 2015Publication date: June 23, 2016Applicant: Stichting IMEC NederlandInventors: Jozef Franciscus Maria Oudenhoven, Vojkan Mihajlovic, Marcel Zevenbergen
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Publication number: 20150265212Abstract: The present invention relates to a stress-measuring system for determining a level of stress of a user, in particular for monitoring an upcoming burnout, the system (10) comprising: an alarm clock (12) for initiating an alarm at an arbitrary preset time, wherein the system (10) comprises an interface (14) for switching off the alarm; a vital sign sensor (16) for measuring a first vital sign of the user while the user operates the interface (14); and a processing unit (18) for determining the level of stress of the user based on the sensed first vital sign.Type: ApplicationFiled: October 16, 2013Publication date: September 24, 2015Inventors: Alphons Antonius Maria Lambertus Bruekers, Murtaza Bulut, Vojkan Mihajlovic, Martin Ouwerkerk, Joanne Henriette Desiree Monique Westerink