Patents by Inventor Md Shahidul ISLAM
Md Shahidul ISLAM 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: 11896380Abstract: An auscultatory sound signal from at least one auscultatory sound-or-vibration sensor is filtered with a high-pass filter and then segmented into a plurality of associated heart cycle segments responsive to associated R-peak locations of an electrographic envelope signal representing an envelope response to an even power of an associated electrographic signal from an ECG sensor. A representation an envelope responsive to an even power of said auscultatory sound signal within said at least one heart cycle is locally modeled about at least a second peak to provide for locating the start of diastole of said at least one heart cycle.Type: GrantFiled: February 23, 2022Date of Patent: February 13, 2024Assignee: AUSCULSCIENCES, INC.Inventors: Sergey A. Telenkov, Robin F. Castelino, David Gloag, Daniel Labonté, Md Shahidul Islam
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Patent number: 11896398Abstract: An auscultatory sound-or-vibration sensor electronic test signal applied to a sound generator generates an acoustic sound signal, responsive to which an auscultatory sound-or-vibration sensor in proximity to the sound generator generates a corresponding auscultatory sound signal. The auscultatory sound-or-vibration sensor electronic test signal incorporates a plurality of frequency components, each frequency component of which incorporates an integral number of wavelengths and is terminated following a duration of time corresponding to the integral number of wavelengths after that frequency component is applied to the corresponding sound generator. A determination of whether or not the auscultatory sound-or-vibration sensor is functioning properly is made responsive to an analysis of a Fourier Transform of the auscultatory sound signal.Type: GrantFiled: June 28, 2021Date of Patent: February 13, 2024Assignee: AUSCULSCIENCES, INC.Inventors: Jun Zhou, Md Shahidul Islam, Jikang Zeng, Daniel Labonté, Simon Martin, Brady Laska, Sergey A. Telenkov
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Publication number: 20220175298Abstract: An auscultatory sound signal from at least one auscultatory sound-or-vibration sensor is filtered with a high-pass filter and then segmented into a plurality of associated heart cycle segments responsive to associated R-peak locations of an electrographic envelope signal representing an envelope response to an even power of an associated electrographic signal from an ECG sensor. A representation an envelope responsive to an even power of said auscultatory sound signal within said at least one heart cycle is locally modeled about at least a second peak to provide for locating the start of diastole of said at least one heart cycle.Type: ApplicationFiled: February 23, 2022Publication date: June 9, 2022Applicant: AUSCULSCIENCES, INC.Inventors: Sergey A. TELENKOV, Robin F. CASTELINO, David GLOAG, Daniel LABONTÉ, Md Shahidul ISLAM
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Patent number: 11284827Abstract: An auscultatory sound signal from at least one auscultatory sound-or-vibration sensor is segmented into a plurality of associated heart cycle segments responsive to associated R-peak locations of an electrographic envelope signal representing an envelope response to an even power of an associated electrographic signal from an ECG sensor. A representation an envelope responsive to an even power of said auscultatory sound signal within said at least one heart cycle is locally modeled about at least a second peak to provide for locating the start of diastole of said at least one heart cycle.Type: GrantFiled: April 21, 2020Date of Patent: March 29, 2022Assignee: AusculSciences, Inc.Inventors: Sergey A. Telenkov, Robin F. Castelino, David Gloag, Daniel Labonté, Md Shahidul Islam
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Publication number: 20220008867Abstract: Membranes for membrane distillation (MD) and forward osmosis (FO) are provided with methods of manufacture and use thereof. The MD membrane comprises a microporous mat of electrospun nanofibers made of a nanocomposite comprising reduced graphene oxide dispersed in a hydrophobic polymer with their surface grafted with a silane coupling agent or with hydrophobic nanoparticles. The FO membrane comprises a microporous support layer and a rejection layer formed on one side of the support layer, wherein the support layer is a microporous mat of electrospun nanofibers made of a nanocomposite of hydrophilic nanoparticles dispersed in a hydrophilic polymer, and the rejection layer is made of nanocomposite of hydrophilic nanoparticles dispersed in a crosslinked meta-aramid of formula (I). There is also provided a process for treating a high-salinity and/or high-strength feed, such as fracking wastewater, comprising microfiltration or ultrafiltration, followed by forward osmosis, and then membrane distillation.Type: ApplicationFiled: September 18, 2019Publication date: January 13, 2022Inventors: Saifur RAHAMAN, Tiantian CHEN, Md. Shahidul ISLAM, Wen MA
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Patent number: 11191486Abstract: At least one of at least one data-dependent scale factor or at least one data-dependent detection threshold is determined responsive to at least one block of time-series data of an auscultatory-sound signal generated by an auscultatory-sound sensor operatively coupled to a portion of the skin of a test-subject, wherein the at least one data-dependent scale factor or at least one data-dependent detection threshold provides a measure of a range of values of the at least one block of time-series data in relation to a predetermined metric, and is used to determine whether or not the auscultatory-sound sensor is either debonded or detached from the skin of the test-subject.Type: GrantFiled: September 19, 2018Date of Patent: December 7, 2021Assignee: AusculSciences, Inc.Inventors: Robert J. Griffin, Daniel Labonté, Md Shahidul Islam, Simon Martin, Camilla Jastrzebski, Brady Laska, David Gloag, Sergey A. Telenkov
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Publication number: 20210338189Abstract: One or more auscultation sensors attached to the skin of an at-least-prospectively contagiously-infected patient are connected via a corresponding associated one or more sensor cables so as to provide for one or more health care practitioners to listen to auscultation sounds from the one or more auscultation sensors from a relatively safe distance, without a need for close proximity to the patient when listening.Type: ApplicationFiled: May 3, 2021Publication date: November 4, 2021Inventors: Marina VERNALIS, Brian J. BOOTH, Simon MARTIN, Jun ZHOU, Md Shahidul ISLAM, Steven P. MORTON
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Publication number: 20210321948Abstract: An auscultatory sound-or-vibration sensor electronic test signal applied to a sound generator generates an acoustic sound signal, responsive to which an auscultatory sound-or-vibration sensor in proximity to the sound generator generates a corresponding auscultatory sound signal. The auscultatory sound-or-vibration sensor electronic test signal incorporates a plurality of frequency components, each frequency component of which incorporates an integral number of wavelengths and is terminated following a duration of time corresponding to the integral number of wavelengths after that frequency component is applied to the corresponding sound generator. A determination of whether or not the auscultatory sound-or-vibration sensor is functioning properly is made responsive to an analysis of a Fourier Transform of the auscultatory sound signal.Type: ApplicationFiled: June 28, 2021Publication date: October 21, 2021Applicant: AUSCULSCIENCES, INC.Inventors: Jun ZHOU, Md Shahidul ISLAM, Jikang ZENG, Daniel LABONTÉ, Simon MARTIN, Brady LASKA, Sergey A. TELENKOV
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Publication number: 20210321947Abstract: At least one sound generator operatively coupleable to a corresponding at least one auscultatory sound-or-vibration sensor provides for generating a corresponding at least one sound signal that is applied to the corresponding at least one auscultatory sound-or-vibration sensor.Type: ApplicationFiled: June 28, 2021Publication date: October 21, 2021Applicant: AUSCULSCIENCES, INC.Inventors: Jun ZHOU, Md Shahidul ISLAM, Jikang ZENG, Daniel LABONTÉ, Simon MARTIN, Brady LASKA, Sergey A. TELENKOV
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Publication number: 20210298685Abstract: An auscultatory sound signal acquired by a recording module is coupled through a high-pass filter having a cut-off frequency in the range of 3 to 15 Hz and subsequently filtered with a low-pass filter, and optionally subject to variable-gain amplification under external control—via a USB or wireless interface—of an associated docking system, responsive to the resulting processed auscultatory sound signal.Type: ApplicationFiled: June 11, 2021Publication date: September 30, 2021Inventors: Jikang ZENG, Md Shahidul ISLAM, Jun ZHOU, Daniel LABONTÉ, Simon MARTIN, Brady LASKA, Sergey A. TELENKOV
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Publication number: 20210298684Abstract: An auscultatory sound signal acquired by a recording module is coupled through a high-pass filter having a cut-off frequency in the range of 3 to 15 Hz and subsequently filtered with a low-pass filter. The high-pass filter incorporates a pair of high-pass filter input circuits having a corresponding pair input terminals across which the auscultatory sound signal is operatively coupled, wherein each high-pass filter input circuit is associated with a corresponding input of an electronic differential-input amplifier, for each high-pass filter input circuit, the corresponding input terminal is operatively coupled to a first terminal of a corresponding capacitor, the second terminal of the corresponding capacitor coupled to both the corresponding input of the electronic differential-input amplifier and to a first terminal of a corresponding resistor, and the second terminal of the corresponding resistor is operatively coupled to a circuit ground.Type: ApplicationFiled: June 11, 2021Publication date: September 30, 2021Applicant: AUSCULSCIENCES, INC.Inventors: Jikang ZENG, Md Shahidul ISLAM, Jun ZHOU, Daniel LABONTÉ, Simon MARTIN, Brady LASKA, Sergey A. TELENKOV
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Patent number: 11045144Abstract: An auscultatory sound signal acquired by a recording module is coupled through a high-pass filter having a cut-off frequency in the range of 3 to 15 Hz and subsequently filtered with a low-pass filter, and optionally subject to variable-gain amplification under external control—via a USB or wireless interface—of an associated docking system, responsive to the resulting processed auscultatory sound signal. A sound generator in the docking system generates an associated test signal having an integral number of wavelengths for each of a plurality of frequencies. The test signal is applied to a corresponding auscultatory sound-or-vibration sensor to test the integrity thereof. Resulting sound signals recorded by the recording module are analyzed using a Fourier Transform to determine sensor integrity.Type: GrantFiled: October 21, 2018Date of Patent: June 29, 2021Assignee: AusculSciences, Inc.Inventors: Jun Zhou, Md Shahidul Islam, Jikang Zeng, Daniel Labonté, Simon Martin, Brady Laska, Sergey A. Telenkov
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Patent number: 11045163Abstract: A time-series array of noise data is generated from an inverse frequency transform of the product of the frequency spectrum of an auscultatory sound signal with an associated noise filter generated responsive to a cross-correlation of frequency spectra of auscultatory sound signals from adjacent auscultatory sound-or-vibration sensors on the torso of a test subject. Noise power within at least one range of frequencies of average of frequency spectra from a plurality of windows of the time-series array of noise data is compared with a threshold to determine whether or not the associated auscultatory sound-or-vibration sensor is excessively noisy. In one embodiment, the noise filter is generated by subtracting from unity, a unity-normalized cross-correlation of frequency spectra of the auscultatory sound signals, wherein the resulting values are clipped so as to be no less than an associated noise floor.Type: GrantFiled: October 21, 2018Date of Patent: June 29, 2021Assignee: AusculSciences, Inc.Inventors: Brady Laska, Md Shahidul Islam, Jikang Zeng, Jun Zhou, Daniel Labonté, Simon Martin
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Publication number: 20190117165Abstract: An auscultatory sound signal acquired by a recording module is coupled through a high-pass filter having a cut-off frequency in the range of 3 to 15 Hz and subsequently filtered with a low-pass filter, and optionally subject to variable-gain amplification under external control—via a USB or wireless interface—of an associated docking system, responsive to the resulting processed auscultatory sound signal. A sound generator in the docking system generates an associated test signal having an integral number of wavelengths for each of a plurality of frequencies. The test signal is applied to a corresponding auscultatory sound-or-vibration sensor to test the integrity thereof. Resulting sound signals recorded by the recording module are analyzed using a Fourier Transform to determine sensor integrity.Type: ApplicationFiled: October 21, 2018Publication date: April 25, 2019Inventors: Jikang ZENG, Md Shahidul ISLAM, Jun ZHOU, Daniel LABONTÉ, Simon MARTIN, Brady LASKA, Sergey A. TELENKOV
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Publication number: 20190117184Abstract: A time-series array of noise data is generated from an inverse frequency transform of the product of the frequency spectrum of an auscultatory sound signal with an associated noise filter generated responsive to a cross-correlation of frequency spectra of auscultatory sound signals from adjacent auscultatory sound-or-vibration sensors on the torso of a test subject. Noise power within at least one range of frequencies of average of frequency spectra from a plurality of windows of the time-series array of noise data is compared with a threshold to determine whether or not the associated auscultatory sound-or-vibration sensor is excessively noisy. In one embodiment, the noise filter is generated by subtracting from unity, a unity-normalized cross-correlation of frequency spectra of the auscultatory sound signals, wherein the resulting values are clipped so as to be no less than an associated noise floor.Type: ApplicationFiled: October 21, 2018Publication date: April 25, 2019Applicant: AUSCULSCIENCES, INC.Inventors: Brady LASKA, Md Shahidul ISLAM, Jikang ZENG, Jun ZHOU, Daniel LABONTÉ, Simon MARTIN
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Publication number: 20190117162Abstract: An auscultatory sound signal acquired by a recording module is coupled through a high-pass filter having a cut-off frequency in the range of 3 to 15 Hz and subsequently filtered with a low-pass filter, and optionally subject to variable-gain amplification under external control—via a USB or wireless interface—of an associated docking system, responsive to the resulting processed auscultatory sound signal. A sound generator in the docking system generates an associated test signal having an integral number of wavelengths for each of a plurality of frequencies. The test signal is applied to a corresponding auscultatory sound-or-vibration sensor to test the integrity thereof. Resulting sound signals recorded by the recording module are analyzed using a Fourier Transform to determine sensor integrity.Type: ApplicationFiled: October 21, 2018Publication date: April 25, 2019Applicant: AUSCULSCIENCES, INC.Inventors: Jun ZHOU, Md Shahidul ISLAM, Jikang ZENG, Daniel LABONTÉ, Simon MARTIN, Brady LASKA, Sergey A. TELENKOV
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Publication number: 20190083038Abstract: At least one of at least one data-dependent scale factor or at least one data-dependent detection threshold is determined responsive to at least one block of time-series data of an auscultatory-sound signal generated by an auscultatory-sound sensor operatively coupled to a portion of the skin of a test-subject, wherein the at least one data-dependent scale factor or at least one data-dependent detection threshold provides a measure of a range of values of the at least one block of time-series data in relation to a predetermined metric, and is used to determine whether or not the auscultatory-sound sensor is either debonded or detached from the skin of the test-subject.Type: ApplicationFiled: September 19, 2018Publication date: March 21, 2019Applicant: AUSCULSCIENCES, INC.Inventors: Robert J. GRIFFIN, Daniel LABONTÉ, Md Shahidul ISLAM, Simon MARTIN, Camilla JASTRZEBSKI, Brady LASKA, David GLOAG, Sergey A. TELENKOV