Patents by Inventor Mark Johnston
Mark Johnston 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: 11969201Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.Type: GrantFiled: August 17, 2021Date of Patent: April 30, 2024Assignee: Covidien LPInventors: Robert H. Wham, Edward L. Brannan, William D. Faulkner, Mark A. Johnston, Aaron G. Mattmiller, Donald L. Tonn
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Patent number: 11941344Abstract: The present technology pertains to displaying a version of a content item and an indication of differences between that version and another version of the content item. For example, a content management system can iterate through portions of a first version of a content item and attempt to match those portions with portions of a second version of the content item. The content management system can analyze these matches to determine differences between the respective portions and to classify and categorize the differences (e.g., do they represent a significant change or do they change the meaning of the content item). A client device can then represent a clean version of the content item in a first application and the differences and characteristics in a second application in coordination with the first application.Type: GrantFiled: September 29, 2016Date of Patent: March 26, 2024Assignee: Dropbox, Inc.Inventors: Amir Baron, Zach Johnston, Anat Danziger, Mark Kaplan, Omer Tamir, Julia Pfeiffenberger, Meir Morgenstern, Adam Fyne
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Patent number: 11919365Abstract: A method of operating a vehicle climate system when an ambient temperature is below a threshold temperature is provided. In response to an ambient temperature being less than a threshold temperature, a controller is adapted to operate a blower motor at a voltage that depends on whether the vehicle is in charge sustain mode or charge deplete mode. In response to an ambient temperature being greater than a threshold temperature, the controller is adapted to operate the blower motor at a voltage that does not depend on whether in the charge sustain or charge deplete modes.Type: GrantFiled: August 5, 2022Date of Patent: March 5, 2024Assignee: Ford Global Technologies, LLCInventors: Jasbir Jaglan, William Stewart Johnston, Alan Douglas Wallington, Curtis Mark Jones, Chris George Oehring, Mark G. Smith
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Publication number: 20240032987Abstract: A method of treating tissue includes clamping tissue between an ultrasonic blade and a jaw member and simultaneously: transmitting ultrasonic energy to the ultrasonic blade to vibrate the ultrasonic blade at a first blade velocity thereby heating the clamped tissue; and supplying electrosurgical energy, at a constant voltage, to the jaw member and the ultrasonic blade at different potentials such that the electrosurgical energy is conducted therebetween and through the clamped tissue to heat the clamped tissue. An impedance of the clamped tissue is monitored and the simultaneous transmission of ultrasonic energy and supply of electrosurgical energy is terminated and/or a notification is output once the clamped tissue is sealed, as indicated by the impedance of the clamped tissue being equal to or greater than a threshold impedance. Surgical instruments and end effectors thereof for treating tissue in this manner are also provided.Type: ApplicationFiled: December 2, 2021Publication date: February 1, 2024Inventors: Michael B. Lyons, James E. Dunning, Kristen P. Bradley, David J. Van Tol, Christopher T. Tschudy, Keith W. Malang, Donald L. Tonn, Mark A. Johnston, James R. Fagan
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Patent number: 11784598Abstract: A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. Slope of the current is continuously monitored which allows the shaft speed to be updated multiple times and to track any change in speed and fix the dwell angle based on the shaft speed. The apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter.Type: GrantFiled: February 27, 2022Date of Patent: October 10, 2023Assignee: Turntide Technologies, Inc.Inventors: Trevor A. Creary, Mahesh Krishnamurthy, Piyush C. Desai, Mark Johnston, Timothy Knodel
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Patent number: 11682995Abstract: The present embodiment is a high rotor pole switched reluctance machine (HRSRM) which provides a plurality of combinations of the number of rotor poles Rn and number of stator poles Sn utilizing a numerical relationship defined by a mathematical formula, Rn=2Sn?Fp, when Sn=m×Fp, wherein Fp is the maximum number of independent flux paths in the stator when stator and rotor poles are fully aligned, and m is the number of phases. The mathematical formulation provides an improved noise performance and design flexibility to the machine. The mathematical formulation further provides a specific number of stator and rotor poles for a chosen m and Fp. The HRSRM can be designed with varying number of phases. The HRSRM provides a smoother torque profile due to a high number of strokes per revolution.Type: GrantFiled: March 7, 2022Date of Patent: June 20, 2023Assignee: Turntide Technologies, Inc.Inventors: Mahesh Krishnamurthy, Trevor Creary, Piyush Desai, Mark Johnston
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Publication number: 20230107792Abstract: A switched reluctance machine comprising at least one rotor comprising a set of rotor poles arranged about a central axis, at least one stator positioned concentric to and radially outward from the central axis and the rotor, the stator having an outer surface and an outer surface active zone; a housing having a sleeve positioned only radially outward from the stator outer surface active zone; at least one housing endplate coupled to an end of said housing; wherein said stator has no direct connection to said housing, and wherein the number of rotor poles Rn and number of stator poles Sn utilizing a numerical relationship defined by a mathematical formula, Rn=2Sn?Fp, when Sn=m×Fp, wherein Fp is the maximum number of independent flux paths in the stator when stator and rotor poles are fully aligned, and m is the number of phases.Type: ApplicationFiled: December 11, 2022Publication date: April 6, 2023Inventors: Piyush Desai, Tim Knodel, Bryan Knodel, Earl Fairall, Mark Johnston, Mahesh Krishnamurthy
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Publication number: 20230108257Abstract: An electrosurgical system includes an electrosurgical device including a pair of opposing jaw members movable between an open jaw position and a closed jaw position, a main switch, a button configured to actuate the main switch, and a secondary switch configured to actuate based on the thickness of the grasped tissue. The system also includes an electrosurgical generator coupled to the electrosurgical device, the electrosurgical generator is configured to generate an electrosurgical output in response to actuation of the main switch and the secondary switch.Type: ApplicationFiled: July 12, 2022Publication date: April 6, 2023Inventors: Lewis R. Puterbaugh, Mark A. Johnston
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Publication number: 20220387093Abstract: An electrosurgical system includes an electrosurgical device having: a main switch, a button configured to actuate the main switch, at least one secondary switch, and a movable component configured to actuate the second switch. The system also includes an electrosurgical generator coupled to the electrosurgical device, the electrosurgical generator is configured to generate an electrosurgical output in response to actuation of the main switch and the at least one secondary switch.Type: ApplicationFiled: May 12, 2022Publication date: December 8, 2022Inventors: Mark A. Johnston, Lewis R. Puterbaugh
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Patent number: 11365490Abstract: A method of manufacturing a thermal cutting element for a surgical instrument includes manufacturing a substrate, coating at least a portion of the substrate via Plasma Electrolytic Oxidation (PEO), and disposing a heating element on at least a portion of the PEO-coated substrate. The method may further include attaching the thermal cutting element to a jaw member of a surgical instrument.Type: GrantFiled: November 23, 2020Date of Patent: June 21, 2022Assignee: Covidien LPInventors: William Robinson, James D. Allen, IV, Mark A. Johnston, Brendan J. Heinig, Hector A. MacPherson
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Publication number: 20220190766Abstract: The present embodiment is a high rotor pole switched reluctance machine (HRSRM) which provides a plurality of combinations of the number of rotor poles Rn and number of stator poles Sn utilizing a numerical relationship defined by a mathematical formula, Rn=2Sn?Fp, when Sn=m×Fp, wherein Fp is the maximum number of independent flux paths in the stator when stator and rotor poles are fully aligned, and m is the number of phases. The mathematical formulation provides an improved noise performance and design flexibility to the machine. The mathematical formulation further provides a specific number of stator and rotor poles for a chosen m and Fp. The HRSRM can be designed with varying number of phases. The HRSRM provides a smoother torque profile due to a high number of strokes per revolution.Type: ApplicationFiled: March 7, 2022Publication date: June 16, 2022Inventors: MAHESH KRISHNAMURTHY, TREVOR CREARY, PIYUSH DESAI, MARK JOHNSTON
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Publication number: 20220190765Abstract: A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. Slope of the current is continuously monitored which allows the shaft speed to be updated multiple times and to track any change in speed and fix the dwell angle based on the shaft speed. The apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter.Type: ApplicationFiled: February 27, 2022Publication date: June 16, 2022Inventors: Trevor A. Creary, Mahesh Krishnamurthy, Piyush C. Desai, Mark Johnston, Timothy Knodel
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Patent number: 11277061Abstract: A high rotor pole switched reluctance machine (HRSRM) employs an axial and radial mirroring concept and is represented by a first Multiple Rotor Pole (MRP) formula and second Multiple Stator Pole (MSP) formula. A multiple rotor HRSRM comprises at least two rotors each having a plurality of rotor poles and at least two stators having a plurality of stator poles. The at least two rotors and the at least two stators are positioned about a central axis with the stator placed between the rotors. In other embodiments, the number of stators equals the number of rotors and effectively operate as a single stator and rotor. In yet another embodiment, the effective single stator and rotor type high rotor pole switched reluctance machine is realized as single stator and rotor positioned concentrically around a central axis.Type: GrantFiled: March 18, 2020Date of Patent: March 15, 2022Assignee: Turntide Technologies, Inc.Inventors: Mahesh Krishnamurthy, Mark Johnston, Trevor Creary, Piyush Desai
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Patent number: 11271509Abstract: The present embodiment is a high rotor pole switched reluctance machine (HRSRM) which provides a plurality of combinations of the number of rotor poles Rn and number of stator poles Sn utilizing a numerical relationship defined by a mathematical formula, Rn=2Sn?Fp, when Sn=m×Fp, wherein Fp is the maximum number of independent flux paths in the stator when stator and rotor poles are fully aligned, and m is the number of phases. The mathematical formulation provides an improved noise performance and design flexibility to the machine. The mathematical formulation further provides a specific number of stator and rotor poles for a chosen m and Fp. The HRSRM can be designed with varying number of phases. The HRSRM provides a smoother torque profile due to a high number of strokes per revolution.Type: GrantFiled: July 5, 2020Date of Patent: March 8, 2022Assignee: Turntide Technologies Inc.Inventors: Mahesh Krishnamurthy, Trevor Creary, Piyush Desai, Mark Johnston
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Patent number: 11264932Abstract: A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. Slope of the current is continuously monitored which allows the shaft speed to be updated multiple times and to track any change in speed and fix the dwell angle based on the shaft speed. The apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter.Type: GrantFiled: July 31, 2020Date of Patent: March 1, 2022Assignee: Turntide Technologies Inc.Inventors: Trevor A. Creary, Mahesh Krishnamurthy, Piyush C. Desai, Mark Johnston, Timothy Knodel
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Publication number: 20220058706Abstract: A system and method, in various embodiments, maintains a cryptographically protected ledger of transactions pertaining to enabling a property owner to require subsequent holders of interests in its property to verify the property owner's informed consent to any transaction that creates or created an interest in its property in any other party. The method may include receiving, at a computing device running an automated agent, a request from a property owner to prepare a record of a contract for verifying and authenticating title-modifying transactions according to a protective scheme included in the contract and a covenant recorded against the title of the real property, which are stored as digital records in a cryptographically protected ledger. A digital certificate is used to verify authenticity of the digital records and confirm consent to the title-modifying transaction.Type: ApplicationFiled: October 5, 2021Publication date: February 24, 2022Applicant: SeniorSafe USA LLCInventors: Roger Norris Gordon, John Mark Johnston
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Publication number: 20210369324Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.Type: ApplicationFiled: August 17, 2021Publication date: December 2, 2021Inventors: Robert H. Wham, Edward L. Brannan, William D. Faulkner, Mark A. Johnston, Aaron G. Mattmiller, Donald L. Tonn
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Publication number: 20210282837Abstract: A tissue resection device includes a handpiece and an end effector assembly extending distally from the handpiece. The end effector assembly includes an outer shaft defining a longitudinal axis and including a window defined therethrough towards a distal end thereof. The end effector assembly further includes an inner member rotationally disposed within the outer shaft. The inner member includes a proximal body portion and a distal cutting portion. The proximal body portion is coaxially disposed on the longitudinal axis and rotatable thereabout. The distal cutting portion includes an offset portion that is radially offset from the longitudinal axis and is configured to orbit about the longitudinal axis. At least a portion of the distal cutting portion is a thermal cutting element configured to heat in response to application of electrical energy thereto.Type: ApplicationFiled: February 11, 2021Publication date: September 16, 2021Inventors: Kenneth E. Netzel, Purvishkumar H. Soni, Kenlyn S. Bonn, Daniel A. Joseph, John A. Hammerland, III, Daniel W. Mercier, Devon E. Scott-Drechsel, Mark A. Johnston, David M. Garrison, Jing Zhao, Yanzhu Zhao
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Patent number: 11090106Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.Type: GrantFiled: April 14, 2016Date of Patent: August 17, 2021Assignee: Covidien LPInventors: Robert H. Wham, Donald L. Tonn, Aaron Mattmiller, William D. Faulkner, Edward L. Brannan, Mark A. Johnston
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Patent number: 11078175Abstract: The invention relates to a substituted dihydrobenzofuran compound of Formula (I), wherein R1 is a linear (C3-C6)alkyl and an insecticide composition comprising at least one insecticide active ingredient and at least one a compound of Formula (I).Type: GrantFiled: September 7, 2016Date of Patent: August 3, 2021Assignees: Endura SPA, AGCHEM ACCESS LTDInventors: Valerio Borzatta, Silvia Carloni, Elisa Capparella, Graham David Moores, János Szilágyi, László Barnabás Takács, József Schmidt, Mark Johnston