Patents by Inventor Dennis E. Larson
Dennis E. Larson 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: 10099059Abstract: Subject matter such as a method or apparatus can include an implantable antenna assembly, comprising a dielectric shell including first and second substantially parallel outer face portions, and a third outer face portion extending between the first and second portions, a spiral conductor extending along the first, second, and third portions on a surface of the dielectric shell. The dielectric shell and spiral conductor can be configured to be mechanically attached to a dielectric compartment, such as configured to be coupled to a housing of an implantable medical device. In an example, the implantable antenna assembly is configured to be electrically coupled to an implantable telemetry circuit configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna, such as included as a portion of an implantable medical device.Type: GrantFiled: August 17, 2015Date of Patent: October 16, 2018Assignee: Cardiac Pacemakers, Inc.Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Patent number: 10004908Abstract: In an example, an apparatus can include an implantable medical device comprising a housing, an implantable telemetry circuit carried within the housing, a dielectric compartment mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions and a third face portion extending between the first and second face portions, and an implantable telemetry antenna, located at least partially within the dielectric compartment. The implantable telemetry circuit can be electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna. In an example the implantable telemetry antenna comprises a spiral conductor portion extending along the first, second, and third face portions. In an example the spiral conductor includes a cross section having a lateral width that can be greater than a sidewall height of the cross section.Type: GrantFiled: November 12, 2015Date of Patent: June 26, 2018Assignee: Cardiac Pacemakers, Inc.Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Patent number: 9616241Abstract: This document discusses, among other things, an implantable dielectric compartment including a channel in an outer surface of the implantable dielectric compartment, the channel configured to constrain a portion of an implantable antenna in a specific configuration along the length of the portion of the implantable antenna. In certain examples, the implantable antenna can be configured to wirelessly transfer information electromagnetically at a specified operating frequency provided using the specific configuration of the portion of the implantable antenna.Type: GrantFiled: October 15, 2009Date of Patent: April 11, 2017Assignee: Cardiac Pacemakers, Inc.Inventors: Mark G. Deehr, David A. Chizek, Mahesh Maddali, Dennis E. Larson, Keith R. Maile
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Patent number: 9579509Abstract: Subject matter such as a method or apparatus can include an implantable antenna assembly, comprising a dielectric shell including first and second substantially parallel outer face portions, and a third outer face portion extending between the first and second portions, a spiral conductor extending along the first, second, and third portions on a surface of the dielectric shell. The dielectric shell and spiral conductor can be configured to be mechanically attached to a dielectric compartment, such as configured to be coupled to a housing of an implantable medical device. In an example, the implantable antenna assembly is configured to be electrically coupled to an implantable telemetry circuit configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna, such as included as a portion of an implantable medical device.Type: GrantFiled: November 22, 2011Date of Patent: February 28, 2017Assignee: Cardiac Pacemakers, Inc.Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Publication number: 20160067504Abstract: In an example, an apparatus can include an implantable medical device comprising a housing, an implantable telemetry circuit carried within the housing, a dielectric compartment mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions and a third face portion extending between the first and second face portions, and an implantable telemetry antenna, located at least partially within the dielectric compartment. The implantable telemetry circuit can be electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna. In an example the implantable telemetry antenna comprises a spiral conductor portion extending along the first, second, and third face portions. In an example the spiral conductor includes a cross section having a lateral width that can be greater than a sidewall height of the cross section.Type: ApplicationFiled: November 12, 2015Publication date: March 10, 2016Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Patent number: 9259585Abstract: In an example, an apparatus can include an implantable medical device comprising a housing, an implantable telemetry circuit carried within the housing, a dielectric compartment mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions and a third face portion extending between the first and second face portions, and an implantable telemetry antenna, located at least partially within the dielectric compartment. The implantable telemetry circuit can be electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna. In an example the implantable telemetry antenna comprises a spiral conductor portion extending along the first, second, and third face portions. In an example the spiral conductor includes a cross section having a lateral width that can be greater than a sidewall height of the cross section.Type: GrantFiled: May 5, 2014Date of Patent: February 16, 2016Assignee: Cardiac Pacemakers, Inc.Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Publication number: 20150357704Abstract: Subject matter such as a method or apparatus can include an implantable antenna assembly, comprising a dielectric shell including first and second substantially parallel outer face portions, and a third outer face portion extending between the first and second portions, a spiral conductor extending along the first, second, and third portions on a surface of the dielectric shell. The dielectric shell and spiral conductor can be configured to be mechanically attached to a dielectric compartment, such as configured to be coupled to a housing of an implantable medical device. In an example, the implantable antenna assembly is configured to be electrically coupled to an implantable telemetry circuit configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna, such as included as a portion of an implantable medical device.Type: ApplicationFiled: August 17, 2015Publication date: December 10, 2015Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Publication number: 20140243930Abstract: In an example, an apparatus can include an implantable medical device comprising a housing, an implantable telemetry circuit carried within the housing, a dielectric compartment mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions and a third face portion extending between the first and second face portions, and an implantable telemetry antenna, located at least partially within the dielectric compartment. The implantable telemetry circuit can be electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna. In an example the implantable telemetry antenna comprises a spiral conductor portion extending along the first, second, and third face portions. In an example the spiral conductor includes a cross section having a lateral width that can be greater than a sidewall height of the cross section.Type: ApplicationFiled: May 5, 2014Publication date: August 28, 2014Applicant: Cardiac Pacemakers, Inc.Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Patent number: 8761896Abstract: In an example, an apparatus can include an implantable medical device comprising a housing, an implantable telemetry circuit carried within the housing, a dielectric compartment mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions and a third face portion extending between the first and second face portions, and an implantable telemetry antenna, located at least partially within the dielectric compartment. The implantable telemetry circuit can be electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna. In an example the implantable telemetry antenna comprises a spiral conductor portion extending along the first, second, and third face portions. In an example the spiral conductor includes a cross section having a lateral width that can be greater than a sidewall height of the cross section.Type: GrantFiled: November 22, 2011Date of Patent: June 24, 2014Assignee: Cardiac Pacemakers, Inc.Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Patent number: 8195305Abstract: A physical arrangement can be provided between at least a portion of a first segment of an implantable antenna with respect to a return conductor, and an input impedance of the implantable antenna can be controlled using the physical arrangement to provide a substantially conjugate match to an output impedance of an implantable telemetry circuit coupled to the implantable antenna.Type: GrantFiled: October 15, 2009Date of Patent: June 5, 2012Assignee: Cardiac Pacemakers, Inc.Inventors: David Nghiem, Ronald W. Solfest, Mahesh Maddali, Mark G. Deehr, Dennis E. Larson, Keith R. Maile
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Publication number: 20120130450Abstract: In an example, an apparatus can include an implantable medical device comprising a housing, an implantable telemetry circuit carried within the housing, a dielectric compartment mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions and a third face portion extending between the first and second face portions, and an implantable telemetry antenna, located at least partially within the dielectric compartment. The implantable telemetry circuit can be electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna. In an example the implantable telemetry antenna comprises a spiral conductor portion extending along the first, second, and third face portions.Type: ApplicationFiled: November 22, 2011Publication date: May 24, 2012Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Publication number: 20120130206Abstract: Subject matter such as a method or apparatus can include an implantable antenna assembly, comprising a dielectric shell including first and second substantially parallel outer face portions, and a third outer face portion extending between the first and second portions, a spiral conductor extending along the first, second, and third portions on a surface of the dielectric shell. The dielectric shell and spiral conductor can be configured to be mechanically attached to a dielectric compartment, such as configured to be coupled to a housing of an implantable medical device. In an example, the implantable antenna assembly is configured to be electrically coupled to an implantable telemetry circuit configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna, such as included as a portion of an implantable medical device.Type: ApplicationFiled: November 22, 2011Publication date: May 24, 2012Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Publication number: 20120130451Abstract: Subject matter such as a method or apparatus can include an implantable medical device comprising a housing, an implantable telemetry circuit carried within the housing, and a dielectric compartment, mechanically coupled to the housing an implantable telemetry antenna, such as located at least partially within the dielectric compartment. The implantable telemetry circuit can be electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna. The implantable telemetry antenna can include a spiral conductor portion extending along a face portion of the dielectric compartment, and a loading portion configured to adjust an input impedance of the implantable telemetry antenna, to provide a specified input impedance range within a specified range of operating frequencies to be used for wireless information transfer.Type: ApplicationFiled: November 22, 2011Publication date: May 24, 2012Inventors: Sasidhar Vajha, Keith R. Maile, Dennis E. Larson, David A. Chizek, John M. Edgell
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Patent number: 8174460Abstract: An implantable medical device can include an implantable antenna for communication with external devices or other internal devices. Changes in the patient's body position, weight, composition or other factors may change the efficiency of the implantable antenna and hinder communication. The disclosed circuit can calculate a value for a matching network for an implantable telemetry circuit to decrease an impedance difference between the implantable telemetry circuit and the implantable antenna or increase or maximize a communication power transfer value associated with the implantable medical device.Type: GrantFiled: July 30, 2008Date of Patent: May 8, 2012Assignee: Cardiac Pacemakers, Inc.Inventors: Dennis E. Larson, Prashant Rawat, Daniel Kollmann
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Patent number: 8060214Abstract: An embodiment of a system for gathering physiologic data related to a human body includes a sensor device implanted in the human body, an inductive coil communicably coupled to the implanted sensor device; and a manager device in communication with the implanted sensor device via the inductive coil. The coil may be wrapped around the sensor device or attached to the sensor device fixation. An embodiment of a method for gathering physiologic data related to a physiologic parameter in a human body includes communicably coupling an inductive coil to communication circuitry of an implantable medical device (IMD), deploying the inductive coil and the IMD into a vessel of the human body, and inducing current in the inductive coil via the communication circuitry, the current representative of data associated with the IMD.Type: GrantFiled: January 5, 2006Date of Patent: November 15, 2011Assignee: Cardiac Pacemakers, Inc.Inventors: Dennis E. Larson, Cheng Zhang, Keith R. Maile, Abhi V. Chavan
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Publication number: 20110166629Abstract: This document discusses, among other things, an implantable telemetry system including an RF transceiver configured to drive an antenna and a matching circuit, configured to be coupled to the antenna, the matching circuit including a control parameter configured to adjust the impedance of the matching circuit. The implantable telemetry system also includes a control circuit configured to receive an indication of the RF transceiver current draw and to control the control parameter of the matching circuit using the received indication of current draw. In an example, the control parameter is controlled to decrease the RF transceiver current draw.Type: ApplicationFiled: December 23, 2010Publication date: July 7, 2011Inventors: Philip G. Dion, Dennis E. Larson, Sasidhar Vajha
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Publication number: 20110082523Abstract: This document discusses, among other things, a system and method for wirelessly sending information electromagnetically at one of a first or a second specified operating frequency from within a biological medium, or receiving information electromagnetically at one of the first or second specified operating frequencies in the biological medium, using an implantable antenna including a switchback portion having multiple segments. The first specified operating frequency and the second specified operating frequency can be provided using the multiple segments.Type: ApplicationFiled: October 4, 2010Publication date: April 7, 2011Inventors: David Nghiem, Ronald W. Solfest, Keith R. Maile, Dennis E. Larson, Thao Nguyen
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Publication number: 20100100157Abstract: A physical arrangement can be provided between at least a portion of a first segment of an implantable antenna with respect to a return conductor, and an input impedance of the implantable antenna can be controlled using the physical arrangement to provide a substantially conjugate match to an output impedance of an implantable telemetry circuit coupled to the implantable antenna.Type: ApplicationFiled: October 15, 2009Publication date: April 22, 2010Inventors: David Nghiem, Ronald W. Solfest, Mahesh Maddali, Mark G. Deehr, Dennis E. Larson, Keith R. Maile
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Publication number: 20100099959Abstract: This document discusses, among other things, an implantable dielectric compartment including a channel in an outer surface of the implantable dielectric compartment, the channel configured to constrain a portion of an implantable antenna in a specific configuration along the length of the portion of the implantable antenna. In certain examples, the implantable antenna can be configured to wirelessly transfer information electromagnetically at a specified operating frequency provided using the specific configuration of the portion of the implantable antenna.Type: ApplicationFiled: October 15, 2009Publication date: April 22, 2010Inventors: Mark G. Deehr, David A. Chizek, Mahesh Maddali, Dennis E. Larson, Keith R. Maile
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Publication number: 20080288028Abstract: An implantable medical device can include an implantable antenna for communication with external devices or other internal devices. Changes in the patient's body position, weight, composition or other factors may change the efficiency of the implantable antenna and hinder communication. The disclosed circuit can calculate a value for a matching network for an implantable telemetry circuit to decrease an impedance difference between the implantable telemetry circuit and the implantable antenna or increase or maximize a communication power transfer value associated with the implantable medical device.Type: ApplicationFiled: July 30, 2008Publication date: November 20, 2008Applicant: Cardiac Pacemakers, Inc.Inventors: Dennis E. Larson, Prashant Rawat, Daniel Kollmann