Patents by Inventor David Haskvitz
David Haskvitz 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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Publication number: 20240181146Abstract: A blood filtration system can be used with an external infusion pump and can include, among other things, a withdrawal line, an infusion (return) line, a filter coupled between the withdrawal line and the infusion line, a controller, and a withdrawal pressure sensor and/or an infusion pressure sensor. The withdrawal pressure sensor can sense a withdrawal pressure signal indicative of a pressure in the withdrawal line. The infusion pressure sensor can be coupled to the infusion line to sense an infusion pressure signal indicative of a pressure in the infusion line. In various embodiments, the controller can detect an operational state of the external infusion pump by analyzing at least the withdrawal pressure signal and/or the infusion pressure signal.Type: ApplicationFiled: August 18, 2022Publication date: June 6, 2024Inventors: David Lerner, David Haskvitz, Kalley Francis Berg, Steven D. Sandoval
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Patent number: 11633529Abstract: A blood filtration system can reduce the amount of plasma constituents (e.g., water and/or electrolytes) in the blood of the patient, and accordingly increase the hematocrit value of the patient. The blood filtration system (e.g., a controller, or the like) can determine a hematocrit value of a patient. The blood filtration system can determine a venous pressure of vasculature of a patient. The blood filtration system can compensate for pressure head in a component of a blood circuit (e.g., a withdrawal line of a catheter), for example to improve the accuracy of the venous pressure determination. The blood filtration system can determine one or more resistance characteristics of a blood circuit for the blood filtration system. The resistance characteristics can correspond to a resistance to a flow of blood through a component of the blood circuit.Type: GrantFiled: December 31, 2019Date of Patent: April 25, 2023Assignee: Nuwellis, Inc.Inventors: David Lerner, David Haskvitz, Dori Jones
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Patent number: 11419969Abstract: A blood filtration system may to couple to an infusion pump that is external to the blood filtration system. The blood filtration system may include a blood circuit, for instance a variable-volume blood circuit. An infusion port may be in communication with the blood circuit and may receive an infusion fluid pumped by the infusion pump. A filtration pump may extract a filtrate fluid from a filter. The filtrate fluid may include filtered plasma constituents. A fluid characteristic sensor may measure one or more of pressure or flow rate of the infusion fluid pumped by the infusion pump. A controller may monitor the fluid characteristic sensor to determine a change in the pressure or flow rate of the infusion fluid. The controller may modulate a speed of the variable-speed filtration pump based on the change in the pressure or flow rate of the infusion fluid.Type: GrantFiled: March 26, 2020Date of Patent: August 23, 2022Assignee: Nuwellis, Inc.Inventors: David Lerner, David Haskvitz, Franz Willems Ulrich
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Publication number: 20220001088Abstract: A blood filtration system may to couple to an infusion pump that is external to the blood filtration system. The blood filtration system may include a blood circuit, for instance a variable-volume blood circuit. An infusion port may be in communication with the blood circuit and may receive an infusion fluid pumped by the infusion pump. A filtration pump may extract a filtrate fluid from a filter. The filtrate fluid may include filtered plasma constituents. A fluid characteristic sensor may measure one or more of pressure or flow rate of the infusion fluid pumped by the infusion pump. A controller may monitor the fluid characteristic sensor to determine a change in the pressure or flow rate of the infusion fluid. The controller may modulate a speed of the variable-speed filtration pump based on the change in the pressure or flow rate of the infusion fluid.Type: ApplicationFiled: March 26, 2020Publication date: January 6, 2022Inventors: David Lerner, David Haskvitz, Franz Willems Ulrich
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Publication number: 20210379262Abstract: A blood filtration system may to couple to an infusion pump that is external to the blood filtration system. The blood filtration system may include a blood circuit, for instance a variable-volume blood circuit. An infusion port may be in communication with the blood circuit and may receive an infusion fluid pumped by the infusion pump. A filtration pump may extract a filtrate fluid from a filter. The filtrate fluid may include filtered plasma constituents. A fluid characteristic sensor may measure one or more of pressure or flow rate of the infusion fluid pumped by the infusion pump. A controller may monitor the fluid characteristic sensor to determine a change in the pressure or flow rate of the infusion fluid. The controller may modulate a speed of the variable-speed filtration pump based on the change in the pressure or flow rate of the infusion fluid.Type: ApplicationFiled: June 3, 2021Publication date: December 9, 2021Inventors: David Lerner, David Haskvitz, Franz Willems Ulrich
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Publication number: 20210379264Abstract: A blood filtration system can reduce the amount of plasma constituents (e.g., water and/or electrolytes) in the blood of the patient, and accordingly increase the hematocrit value of the patient. The blood filtration system (e.g., a controller, or the like) can determine a hematocrit value of a patient. The blood filtration system can determine a venous pressure of vasculature of a patient. The blood filtration system can compensate for pressure head in a component of a blood circuit (e.g., a withdrawal line of a catheter), for example to improve the accuracy of the venous pressure determination. The blood filtration system can determine one or more resistance characteristics of a blood circuit for the blood filtration system. The resistance characteristics can correspond to a resistance to a flow of blood through a component of the blood circuit.Type: ApplicationFiled: June 3, 2021Publication date: December 9, 2021Inventors: David Lerner, David Haskvitz, Dori Jones
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Publication number: 20210338915Abstract: A blood filtration system can reduce the amount of plasma constituents (e.g., water and/or electrolytes) in the blood of the patient, and accordingly increase the hematocrit value of the patient. The blood filtration system (e.g., a controller, or the like) can determine a hematocrit value of a patient. The blood filtration system can determine a venous pressure of vasculature of a patient. The blood filtration system can compensate for pressure head in a component of a blood circuit (e.g., a withdrawal line of a catheter), for example to improve the accuracy of the venous pressure determination. The blood filtration system can determine one or more resistance characteristics of a blood circuit for the blood filtration system. The resistance characteristics can correspond to a resistance to a flow of blood through a component of the blood circuit.Type: ApplicationFiled: December 31, 2019Publication date: November 4, 2021Inventors: David Lerner, David Haskvitz, Dori Jones
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Patent number: 9775209Abstract: A circuit having a series interconnection of a light-emitting diode (LED) group, a first transistor, a second transistor and a first resistor. The series interconnection has a cathode coupled to a drain terminal of the first transistor and a source terminal of the first transistor is coupled to a first terminal of the first resistor wherein voltage across the first resistor to provide a biasing voltage for the first transistor. A source terminal of the second transistor is coupled to a first terminal of the first resistor wherein voltage across the second resistor provides a biasing voltage for the second transistor and ancillary circuitry bypasses the series interconnection. The ancillary circuitry has a capacitor to provide current to the series interconnection to increase the amount of light emitted during an electrical excitation cycle.Type: GrantFiled: November 30, 2016Date of Patent: September 26, 2017Assignee: ONCE INNOVATIONS, INC.Inventors: Zdenko Grajcar, David Haskvitz
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Patent number: 9730288Abstract: An analog AC circuit for light emitting diode (LED) groups that provides continuously emitted light through a dimming process from 100% relative light output to 5% of relative light output. The analog AC circuit utilizes ancillary circuitry that bypasses a first series interconnection of a first LED group and presents a capacitor electrically connected to an ancillary transistor to provide constant current at above a current threshold to cause the first LED group to continuously emit light even through a dimming process.Type: GrantFiled: August 30, 2016Date of Patent: August 8, 2017Assignee: Once Innovations, Inc.Inventor: David Haskvitz
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Publication number: 20170156186Abstract: A circuit having a series interconnection of a light-emitting diode (LED) group, a first transistor, a second transistor and a first resistor. The series interconnection has a cathode coupled to a drain terminal of the first transistor and a source terminal of the first transistor is coupled to a first terminal of the first resistor wherein voltage across the first resistor to provide a biasing voltage for the first transistor. A source terminal of the second transistor is coupled to a first terminal of the first resistor wherein voltage across the second resistor provides a biasing voltage for the second transistor and ancillary circuitry bypasses the series interconnection. The ancillary circuitry has a capacitor to provide current to the series interconnection to increase the amount of light emitted during an electrical excitation cycle.Type: ApplicationFiled: November 30, 2016Publication date: June 1, 2017Applicant: Once, Inc.Inventors: Zdenko Grajcar, David Haskvitz
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Publication number: 20170064781Abstract: An analog AC circuit for light emitting diode (LED) groups that provides continuously emitted light through a dimming process from 100% relative light output to 5% of relative light output. The analog AC circuit utilizes ancillary circuitry that bypasses a first series interconnection of a first LED group and presents a capacitor electrically connected to an ancillary transistor to provide constant current at above a current threshold to cause the first LED group to continuously emit light even through a dimming process.Type: ApplicationFiled: August 30, 2016Publication date: March 2, 2017Inventor: David Haskvitz