Patents by Inventor Muhammad Asif
Muhammad Asif 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: 11769522Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole (MP), a trailing shield (TS), a trailing gap (TG) disposed between the MP and the TS, and a spin torque oscillator (STO) disposed in the TG adjacent to the MP. A notch may be disposed in the TG between the STO and TS. The notch comprises one or more notch interlayers comprising a non-magnetic material and/or a magnetic material. A bump may be disposed in the TG between the TS and the STO or the notch. The bump comprises one or more bump interlayers comprising a non-magnetic material. A hot seed layer may be coupled to the TS adjacent to the bump, the notch, or the STO. The hot seed layer comprises one or more hot seed interlayers comprising a non-magnetic material.Type: GrantFiled: June 11, 2021Date of Patent: September 26, 2023Assignee: Western Digital Technologies, Inc.Inventors: Alexander Goncharov, Muhammad Asif Bashir, Petrus Antonius Van Der Heijden
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Patent number: 11736781Abstract: Aspects of the present disclosure reduce visual artifacts and provide robust video signals to end-user equipment. According to an aspect, a system includes a splice point controller that analyzes video to detect and compensate for content boundary misalignments. The splice point controller can process video streams by analyzing splice point parameters and/or dynamically updating adjustment values associated with splice points to ensure appropriate transitions from primary content to secondary or alternate content. After determining an adjustment value for a splice point, the splice point controller can provide splice point adjustment feedback to a signal processing engine and/or to a secondary content source as part of synchronizing outputs of a transcoder farm and/or the secondary content source. For example, the splice point controller can operate to align a splice point adjustment value associated with an SCTE-35 descriptor with an actual live splice point time that is included with a live broadcast.Type: GrantFiled: April 18, 2022Date of Patent: August 22, 2023Assignee: Cox Communications, Inc.Inventors: Ray Killick, Jayasri Devalapalli, Muhammad Asif Raza, Ramkumar Krishnan
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Patent number: 11733146Abstract: A method for determining a column-hemispherical permeation radius with time-varying property of power-law cement grout and tortuosity of rock and soil mass is provided, including: acquiring a porosity ? of rock and soil mass and a corresponding permeation coefficient K by geotechnical tests, measuring a groundwater pressure P0 at a grouting point and determining tortuosity ? of rock and soil mass; acquiring an initial consistency coefficient c0, a rheological index n and a time-varying property coefficient k of power-law cement grout with a designed water to cement ratio by rheological tests, and determining the viscosity of water ?w; acquiring grouting parameters, including a grouting pressure P1, grouting time t, a number m of grouting holes of a side surface of a grouting pipe and a grouting hole radius r; and solving a column-hemispherical permeation grouting diffusion radius R considering coupling effect both the tortuosity of rock and soil mass and the time-varying property of power-law cement grout.Type: GrantFiled: November 30, 2022Date of Patent: August 22, 2023Assignee: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Zhiquan Yang, Mao Chen, Yingyan Zhu, Yi Yang, Wentao Chen, Yuqing Liu, Muhammad Asif Khan, Bihua Zhang, Hanhua Xu, Tianbing Xiang, Jie Zhang
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Publication number: 20230245681Abstract: A heat-assisted magnetic recording (HAMR) head has a slider with a gas-bearing-surface (GBS). The slider supports a near-field transducer (NFT) and a main magnetic pole that has a step or recess in the NFT-facing surface near the GBS that contains plasmonic material. A thermal shunt is located between the NFT and the main pole to allow heat to be transferred away from the optical spot generated by the NFT. The NFT-facing surface of the main pole that is recessed from the step away from the GBS is in contact with the thermal shunt, and the thermal shunt is in contact with the plasmonic material in the step in the back region recessed from the GBS, so there is no increase in the spacing between the NFT and a large portion of the main pole.Type: ApplicationFiled: December 14, 2022Publication date: August 3, 2023Applicant: Western Digital Technologies, Inc.Inventors: Takuya MATSUMOTO, Barry Cushing STIPE, Muhammad ASIF BASHIR
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Patent number: 11651791Abstract: A heat-assisted magnetic recording (HAMR) head for recording data in data tracks of a HAMR disk has a gas-bearing slider that supports a near-field transducer (NFT) and a main magnetic pole formed of two layers. The first main pole layer has a cross-track width at the slider's gas-bearing surface (GBS) that tapers down in the direction towards the NFT where the optical spot is formed. The second main pole layer is located away from the NFT and has a substantially wider cross-track width than the first main pole layer so as to provide sufficient magnetic field for writing. Layers of heat sink material are located on the sloped cross-track sides of the tapered first main pole layer to reduce the temperature and thus the likelihood of oxidation of the main pole layers.Type: GrantFiled: July 21, 2022Date of Patent: May 16, 2023Assignee: Western Digital Technologies, Inc.Inventors: Takuya Matsumoto, Muhammad Asif Bashir, Hamid Balamane, Petrus Antonius Van Der Heijden, Barry C. Stipe
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Patent number: 11600293Abstract: A magnetic recording device includes a main pole, a coil around the main pole, a trailing shield, and a leading shield. A trailing gap is between the main pole and the trailing shield. In one embodiment, the trailing gap includes a non-magnetic conductive material. In another embodiment, the trailing gap includes a spin torque oscillator device. A leading gap is between the main pole and the leading shield. The leading gap includes a non-magnetic conductive material. The main pole is coupled to a first terminal. The trailing shield coupled to a second terminal. The leading shield is coupled to a third terminal.Type: GrantFiled: September 3, 2019Date of Patent: March 7, 2023Assignee: Western Digital Technologies, Inc.Inventors: Terence Lam, Michael Kuok San Ho, Yaguang Wei, Zhigang Bai, Muhammad Asif Bashir
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Patent number: 11557314Abstract: Embodiments of the present disclosure generally relate to magnetic recording systems, and more particularly to a magnetic recording system with a current-assisted write head. The write head comprises a main pole, a trailing shield disposed above the main pole, a trailing gap disposed between the main pole and the trailing shield, a side shield surrounding three sides of the main pole, the side shield being in contact with and disposed below the trailing shield and the trailing gap, and a side gap disposed between the side shield and each of the three sides of the main pole. The side gap comprises a non-magnetic electrically-conducting material to dissipate heat away from the main pole, lowering the resistance and temperature rise due to heating. The trailing gap may further comprise a non-magnetic electrically-conducting material. The write head may have a two terminal or three terminal connection configuration.Type: GrantFiled: June 26, 2019Date of Patent: January 17, 2023Assignee: Western Digital Technologies, Inc.Inventors: Muhammad Asif Bashir, Zhigang Bai, Yaguang Wei, Terence Lam, Youfeng Zheng, Changqing Shi, Michael Kuok San Ho, Xinjiang Shen, Suping Song, Lijie Guan, Venkatesh Chembrolu
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Patent number: 11532329Abstract: A heat-assisted magnetic recording (HAMR) head has a slider with a gas-bearing-surface (GBS). The slider supports a near-field transducer (NFT) and a main magnetic pole that has a step or recess in the NFT-facing surface near the GBS that contains plasmonic material. A thermal shunt is located between the NFT and the main pole to allow heat to be transferred away from the optical spot generated by the NFT. The NFT-facing surface of the main pole that is recessed from the step away from the GBS is in contact with the thermal shunt, and the thermal shunt is in contact with the plasmonic material in the step in the back region recessed from the GBS, so there is no increase in the spacing between the NFT and a large portion of the main pole.Type: GrantFiled: January 31, 2022Date of Patent: December 20, 2022Assignee: Western Digital Technologies, Inc.Inventors: Takuya Matsumoto, Barry Cushing Stipe, Muhammad Asif Bashir
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Publication number: 20220399035Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole (MP), a trailing shield (TS), a trailing gap (TG) disposed between the MP and the TS, and a spin torque oscillator (STO) disposed in the TG adjacent to the MP. A notch may be disposed in the TG between the STO and TS. The notch comprises one or more notch interlayers comprising a non-magnetic material and/or a magnetic material. A bump may be disposed in the TG between the TS and the STO or the notch. The bump comprises one or more bump interlayers comprising a non-magnetic material. A hot seed layer may be coupled to the TS adjacent to the bump, the notch, or the STO. The hot seed layer comprises one or more hot seed interlayers comprising a non-magnetic material.Type: ApplicationFiled: June 11, 2021Publication date: December 15, 2022Inventors: Alexander GONCHAROV, Muhammad ASIF BASHIR, Petrus Antonius VAN DER HEIJDEN
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Publication number: 20220371184Abstract: Apparatuses, systems, and techniques provide a policy that can be executed to cause a machine to move. In at least one embodiment, a first policy layer is provided to cause the machine to execute a first motion that causes the machine to accelerate to reach an unbiased state. A second policy layer is provided to cause the machine to execute a second motion without influencing the unbiased state to be reached by machine. The policy can comprise the first and second policy layers.Type: ApplicationFiled: April 26, 2022Publication date: November 24, 2022Inventors: Nathan Donald Ratliff, Karl Van Wyk, Man Xie, Anqi Li, Muhammad Asif Rana
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Patent number: 11508401Abstract: Aspects of the present disclosure generally relate to a magnetic recording head of a magnetic recording device that facilitates generating a downtrack magnetic bias field to enhance writing. During magnetic writing using the magnetic recording head, a bias current is directed in a cross-track direction on the trailing side of the main pole. Bias current flowing in the cross-track direction on a leading side of the main pole is reduced or eliminated. The bias current flowing in the cross-track direction on the trailing side of the main pole facilitates generating a magnetic field in a downtrack direction. The magnetic field in the downtrack direction is a bias field generated using the bias current. The magnetic bias field in the downtrack direction facilitates enhanced writing performance and increased areal density capability (ADC) for magnetic recording.Type: GrantFiled: February 23, 2021Date of Patent: November 22, 2022Assignee: Western Digital Technologies, Inc.Inventors: Muhammad Asif Bashir, Petrus Antonius Van Der Heijden, James Terrence Olson, Alexander Goncharov, Zhigang Bai, Yunfei Ding
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Publication number: 20220358964Abstract: A heat-assisted magnetic recording (HAMR) head for recording data in data tracks of a HAMR disk has a gas-bearing slider that supports a near-field transducer (NFT) and a main magnetic pole formed of two layers. The first main pole layer has a cross-track width at the slider's gas-bearing surface (GBS) that tapers down in the direction towards the NFT where the optical spot is formed. The second main pole layer is located away from the NFT and has a substantially wider cross-track width than the first main pole layer so as to provide sufficient magnetic field for writing. Layers of heat sink material are located on the sloped cross-track sides of the tapered first main pole layer to reduce the temperature and thus the likelihood of oxidation of the main pole layers.Type: ApplicationFiled: July 21, 2022Publication date: November 10, 2022Applicant: Western Digital Technologies, Inc.Inventors: Takuya MATSUMOTO, Muhammad ASIF BASHIR, Hamid BALAMANE, Petrus Antonius VAN DER HEIJDEN, Barry C. STIPE
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Publication number: 20220358959Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a main pole, a trailing shield, and a MAMR stack including at least one magnetic layer. The magnetic layer has a surface facing the main pole, and the surface has a first side at a media facing surface (MFS) and a second side opposite the first side. The length of the second side is substantially less than the length of the first side. By reducing the length of the second side, the area to be switched at a location recessed from the MFS is reduced as a current flowing from the main pole to the trailing shield or from the trailing shield to the main pole. With the reduced area of the magnetic layer, the overall switch time of the magnetic layer is decreased.Type: ApplicationFiled: July 20, 2022Publication date: November 10, 2022Applicant: Western Digital Technologies, Inc.Inventors: Venkatesh H CHEMBROLU, Muhammad ASIF BASHIR, Petrus Antonius VAN DER HEIJDEN, Terence T. LAM, Yaguang WEI
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Patent number: 11462243Abstract: A heat-assisted magnetic recording (HAMR) head for recording data in data tracks of a HAMR disk has a gas-bearing slider that supports a near-field transducer (NFT) and a main magnetic pole formed of two layers. The first main pole layer has a cross-track width at the slider's gas-bearing surface (GBS) that tapers down in the direction towards the NFT where the optical spot is formed. The second main pole layer is located away from the NFT and has a substantially wider cross-track width than the first main pole layer so as to provide sufficient magnetic field for writing. Layers of heat sink material are located on the sloped cross-track sides of the tapered first main pole layer to reduce the temperature and thus the likelihood of oxidation of the main pole layers.Type: GrantFiled: July 30, 2020Date of Patent: October 4, 2022Assignee: Western Digital Technologies, Inc.Inventors: Takuya Matsumoto, Muhammad Asif Bashir, Hamid Balamane, Petrus Vanderheijden, Barry Cushing Stripe
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Patent number: 11437060Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a main pole, a trailing shield, and a MAMR stack including at least one magnetic layer. The magnetic layer has a surface facing the main pole, and the surface has a first side at a media facing surface (MFS) and a second side opposite the first side. The length of the second side is substantially less than the length of the first side. By reducing the length of the second side, the area to be switched at a location recessed from the MFS is reduced as a current flowing from the main pole to the trailing shield or from the trailing shield to the main pole. With the reduced area of the magnetic layer, the overall switch time of the magnetic layer is decreased.Type: GrantFiled: November 30, 2020Date of Patent: September 6, 2022Assignee: Western Digital Technologies, Inc.Inventors: Venkatesh Chembrolu, Muhammad Asif Bashir, Petrus Antonius Van Der Heijden, Terence Lam, Yaguang Wei
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Patent number: 11417356Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole, a hot seed layer, and a write assist stack disposed between the main pole and the hot seed layer. In one embodiment, the write assist stack comprises a seed layer, a spin torque layer, and a notch layer. One or more of the seed layer and the notch layer have a first cross-track width and the spin torque layer has a second cross-track width less than the first cross track width. In another embodiment, the write assist stack comprises a seed layer, a spin polarization layer, and a notch layer. One or more of the seed layer and the notch layer have a first cross-track width and the spin polarization layer has a second cross-track width less than the first cross track width.Type: GrantFiled: June 30, 2020Date of Patent: August 16, 2022Assignee: Western Digital Technologies, Inc.Inventors: Muhammad Asif Bashir, Alexander Goncharov, Petrus Antonius Van Der Hemden, Aron Pentek, Yi Zhang, Venkatesh Chembrolu
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Patent number: 11324912Abstract: The principles and embodiments of the present invention relate to methods and systems for safely providing NO to a recipient for inhalation therapy. There are many potential safety issues that may arise from using a reactor cartridge that converts NO2 to NO, including exhaustion of consumable reactants of the cartridge reactor. Accordingly, various embodiments of the present invention provide systems and methods of determining the remaining useful life of a NO2-to-NO reactor cartridge and/or a break-through of NO2, and providing an indication of the remaining useful life and/or break-through.Type: GrantFiled: November 26, 2019Date of Patent: May 10, 2022Assignee: Mallinckrodt Pharmaceuticals Ireland LimitedInventors: Jaron Acker, Muhammad Asif, Craig Flanagan, Douglas Alan Greene, Sarah Jayne Ridley, Frank Kenneth Schweighardt, Lien-Lung Sheu
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Patent number: 11323367Abstract: A method, apparatus and system for transferring data from an apparatus called multi-protocol gateway in a network seamlessly that operates using a particular protocol, to another device that is either in the same network or outside operating in a totally different protocol is described. Today, to accomplish this requires external units, one per technology. For example, for supporting both WiFi and WiMAX devices today, we would require a WiFi access point, a WiMAX base station and a router. We provide plug-ins that would handle multiple protocols within the same gateway, to cater to devices that operate in those protocols. The apparatus translates between various protocols in the back end making it inexpensive and portable. The unit is scalable, grows with technology, and acts as a gateway to a local network. The device can be configured to address Quality of Service, Priority between technologies and fault-tolerance through management layer.Type: GrantFiled: June 24, 2014Date of Patent: May 3, 2022Assignee: Umm-Al-Qura UniversityInventors: Emad Abdulrazzak Felemban, Adil Amjad Ashraf Sheikh, Moshin Murad, Muhammad Asif Manzoor
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Publication number: 20220003740Abstract: Methods for identifying hydrocarbon contamination sources may include fingerprinting hydrocarbons using isotopocule analyses for BTEX compounds. For example, methods for identifying hydrocarbon contamination sources may comprise: extracting BTEX compounds from a sample; measuring the isotopocule composition of the BTEX compounds; and determining a characteristic of the sample based on the isotopocule composition. Such characteristics may include, but are not limited to, the characteristic of the sample comprises one or more selected from the group consisting of: a source of the sample, a condition at which the sample formed or was last equilibrated, a migration time from a source to a sample location, weathering of the sample, and degree to which the sample is anthropogenic and naturally-occurring.Type: ApplicationFiled: June 29, 2021Publication date: January 6, 2022Inventors: David T. Wang, Muhammad Asif, Michael J. Formolo
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Publication number: 20210336560Abstract: The invention relates to a method and an actuator system for determining and applying a voltage to a piezoelectric actuator (PEA) to achieve a given setpoint displacement. The method involves determining a relation dcal(V) between a PEA displacement measure (d) and voltage (V) and a relation ttcal(V) between transition time (tt) and voltage and combining the determined relations to calculate a relation d(tt) between the displacement measure and transition time during an initial calibration procedure. This relation is characteristic for the PEA, and by determining a new relation ttnew(V) after repeated biasing of the PEA, a compensated relation dc(V) can be calculated by substituting ttnew(V) in the calculated d(tt). The compensated relation dc(V) compensates for piezo creep effects due to the wear and can be used to determine the voltage to be applied directly, or be used in other compensation algorithms.Type: ApplicationFiled: March 7, 2019Publication date: October 28, 2021Inventors: Lars Henriksen, Tore Svortdal, Euan Barron, Muhammad Asif Raza Azhar, Thi Kim Trinh Tran, Nicolas Tallaron, Pierre Craen