Patents by Inventor David McCallum
David McCallum 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: 11901476Abstract: The present invention utilizes epitaxial lift-off in which a sacrificial layer is included in the epitaxial growth between the substrate and a thin film III-V compound solar cell. To provide support for the thin film III-V compound solar cell in absence of the substrate, a backing layer is applied to a surface of the thin film III-V compound solar cell before it is separated from the substrate. To separate the thin film III-V compound solar cell from the substrate, the sacrificial layer is removed as part of the epitaxial lift-off. Once the substrate is separated from the thin film III-V compound solar cell, the substrate may then be reused in the formation of another thin film III-V compound solar cell.Type: GrantFiled: February 8, 2021Date of Patent: February 13, 2024Assignee: MICROLINK DEVICES, INC.Inventors: Noren Pan, Glen Hillier, Duy Phach Vu, Rao Tatavarti, Christopher Youtsey, David McCallum, Genevieve Martin
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Publication number: 20230370020Abstract: Technology is disclosed herein for reverse current protection for a photovoltaic module string. An apparatus has a switch connected between each respective PV module string and a power bus. A control circuit closes a set of the switches to connect a set of the PV module strings to the power bus to transfer power from the set of the photovoltaic PV module strings to the power bus. The control circuit determines whether a reverse current flows in the direction from the power bus to any of the PV module strings. The control circuit maintains the switch associated with a particular PV module string in an open state to prevent reverse current from flowing in the particular PV module string responsive to a determination that a reverse current flows in the particular PV module string when the particular PV module string is connected to the power bus.Type: ApplicationFiled: May 19, 2022Publication date: November 16, 2023Applicant: Maxar Space LLCInventors: Jason Esquivias, Jeffrey David McCallum
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Publication number: 20230369876Abstract: Technology is disclosed herein for a power control and distribution unit (PCDU) of a spacecraft that has a microcontroller to control battery charging from solar arrays. Using a microcontroller within the PCDU reduces the complexity of the PCDU. The microcontroller may be programmable and reprogrammable, which allows the charging of the battery to be adapted to various conditions. For example, the microcontroller can be programmed in accordance with the mission to optimize battery charging for that mission.Type: ApplicationFiled: May 13, 2022Publication date: November 16, 2023Applicant: Maxar Space LLCInventors: Jason Esquivias, Lee Charles Rotlisberger, Jeffrey David McCallum
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Patent number: 11799420Abstract: Technology is disclosed herein for reverse current protection for a photovoltaic module string. An apparatus has a switch connected between each respective PV module string and a power bus. A control circuit closes a set of the switches to connect a set of the PV module strings to the power bus to transfer power from the set of the photovoltaic PV module strings to the power bus. The control circuit determines whether a reverse current flows in the direction from the power bus to any of the PV module strings. The control circuit maintains the switch associated with a particular PV module string in an open state to prevent reverse current from flowing in the particular PV module string responsive to a determination that a reverse current flows in the particular PV module string when the particular PV module string is connected to the power bus.Type: GrantFiled: May 19, 2022Date of Patent: October 24, 2023Assignee: Maxar Space LLCInventors: Jason Esquivias, Jeffrey David McCallum
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Publication number: 20210328093Abstract: The present invention utilizes epitaxial lift-off in which a sacrificial layer is included in the epitaxial growth between the substrate and a thin film III-V compound solar cell. To provide support for the thin film III-V compound solar cell in absence of the substrate, a backing layer is applied to a surface of the thin film III-V compound solar cell before it is separated from the substrate. To separate the thin film III-V compound solar cell from the substrate, the sacrificial layer is removed as part of the epitaxial lift-off. Once the substrate is separated from the thin film III-V compound solar cell, the substrate may then be reused in the formation of another thin film III-V compound solar cell.Type: ApplicationFiled: February 8, 2021Publication date: October 21, 2021Inventors: Noren Pan, Glen Hillier, Duy Phach Vu, Rao Tatavarti, Christopher Youtsey, David McCallum, Genevieve Martin
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Publication number: 20210323689Abstract: Some embodiments include a high efficiency, lightweight solar sheet. Some embodiments include a solar sheet configured for installation on a surface of a UAV or on a surface of a component of a UAV. The solar sheet includes a plurality of solar cells and a polymer layer to which the plurality of solar cells are attached. Some embodiments include a kit for supplying solar power in a battery-powered or fuel cell powered unmanned aerial vehicle (UAV) by incorporating flexible solar cells into a component of a UAV, affixing flexible solar cells to a surface of a UAV, or affixing flexible solar cells to a surface of a component of a UAV. The kit also includes a power conditioning system configured to operate the solar cells within a desired power range and configured to provide power having a voltage compatible with an electrical system of the UAV.Type: ApplicationFiled: June 23, 2021Publication date: October 21, 2021Inventors: Noren Pan, Raymond Chan, Haruki Miyamoto, Andree Wibowo, Mark Osowski, Christopher Youtsey, David McCallum
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Patent number: 10923617Abstract: The present invention utilizes epitaxial lift-off in which a sacrificial layer is included in the epitaxial growth between the substrate and a thin film III-V compound solar cell. To provide support for the thin film III-V compound solar cell in absence of the substrate, a backing layer is applied to a surface of the thin film III-V compound solar cell before it is separated from the substrate. To separate the thin film III-V compound solar cell from the substrate, the sacrificial layer is removed as part of the epitaxial lift-off. Once the substrate is separated from the thin film III-V compound solar cell, the substrate may then be reused in the formation of another thin film III-V compound solar cell.Type: GrantFiled: June 21, 2011Date of Patent: February 16, 2021Assignee: MICROLINK DEVICES, INC.Inventors: Noren Pan, Glen Hillier, Duy Phach Vu, Rao Tatavarti, Christopher Youtsey, David McCallum, Genevieve Martin
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Publication number: 20190322376Abstract: Some embodiments include a high efficiency, lightweight solar sheet. Some embodiments include a solar sheet configured for installation on a surface of a UAV or on a surface of a component of a UAV. The solar sheet includes a plurality of solar cells and a polymer layer to which the plurality of solar cells are attached. Some embodiments include a kit for supplying solar power in a battery-powered or fuel cell powered unmanned aerial vehicle (UAV) by incorporating flexible solar cells into a component of a UAV, affixing flexible solar cells to a surface of a UAV, or affixing flexible solar cells to a surface of a component of a UAV. The kit also includes a power conditioning system configured to operate the solar cells within a desired power range and configured to provide power having a voltage compatible with an electrical system of the UAV.Type: ApplicationFiled: February 22, 2019Publication date: October 24, 2019Inventors: Noren Pan, Raymond Chan, Haruki Miyamoto, Andree Wibowo, Mark Osowski, Christopher Youtsey, David McCallum
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Patent number: 10214295Abstract: Some embodiments include a high efficiency, lightweight solar sheet. Some embodiments include a solar sheet configured for installation on a surface of a UAV or on a surface of a component of a UAV. The solar sheet includes a plurality of solar cells and a polymer layer to which the plurality of solar cells are attached. Some embodiments include a kit for supplying solar power in a battery-powered or fuel cell powered unmanned aerial vehicle (UAV) by incorporating flexible solar cells into a component of a UAV, affixing flexible solar cells to a surface of a UAV, or affixing flexible solar cells to a surface of a component of a UAV. The kit also includes a power conditioning system configured to operate the solar cells within a desired power range and configured to provide power having a voltage compatible with an electrical system of the UAV.Type: GrantFiled: May 8, 2017Date of Patent: February 26, 2019Assignee: MICROLINK DEVICES, INC.Inventors: Noren Pan, Raymond Chan, Haruki Miyamoto, Andree Wibowo, Mark Osowski, Christopher Youtsey, David McCallum
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Publication number: 20170305564Abstract: Some embodiments include a high efficiency, lightweight solar sheet. Some embodiments include a solar sheet configured for installation on a surface of a UAV or on a surface of a component of a UAV. The solar sheet includes a plurality of solar cells and a polymer layer to which the plurality of solar cells are attached. Some embodiments include a kit for supplying solar power in a battery-powered or fuel cell powered unmanned aerial vehicle (UAV) by incorporating flexible solar cells into a component of a UAV, affixing flexible solar cells to a surface of a UAV, or affixing flexible solar cells to a surface of a component of a UAV. The kit also includes a power conditioning system configured to operate the solar cells within a desired power range and configured to provide power having a voltage compatible with an electrical system of the UAV.Type: ApplicationFiled: May 8, 2017Publication date: October 26, 2017Inventors: Noren Pan, Raymond Chan, Haruki Miyamoto, Andree Wibowo, Mark Osowski, Christopher Youtsey, David McCallum
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Patent number: 9650148Abstract: Some embodiments include a kit for supplying solar power in a battery-powered or fuel cell powered unmanned aerial vehicle (UAV) by incorporating flexible solar cells into a component of a UAV, affixing flexible solar cells to a surface of a UAV, or affixing flexible solar cells to a surface of a component of a UAV. The kit also includes a power conditioning system configured to operate the solar cells within a desired power range and configured to provide power having a voltage compatible with an electrical system of the UAV. Another embodiments include a solar sheet configured for installation on a surface of a UAV or on a surface of a component of a UAV. The solar sheet includes a plurality of solar cells and a polymer layer to which the plurality of solar cells are attached.Type: GrantFiled: April 18, 2016Date of Patent: May 16, 2017Assignee: MICROLINK DEVICES, INC.Inventors: Noren Pan, Raymond Chan, Haruki Miyamoto, Andree Wibowo, Mark Osowski, Christopher Youtsey, David McCallum
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Publication number: 20170015430Abstract: Some embodiments include a kit for supplying solar power in a battery-powered or fuel cell powered unmanned aerial vehicle (UAV) by incorporating flexible solar cells into a component of a UAV, affixing flexible solar cells to a surface of a UAV, or affixing flexible solar cells to a surface of a component of a UAV. The kit also includes a power conditioning system configured to operate the solar cells within a desired power range and configured to provide power having a voltage compatible with an electrical system of the UAV. Another embodiments include a solar sheet configured for installation on a surface of a UAV or on a surface of a component of a UAV. The solar sheet includes a plurality of solar cells and a polymer layer to which the plurality of solar cells are attached.Type: ApplicationFiled: April 18, 2016Publication date: January 19, 2017Inventors: Noren Pan, Raymond Chan, Haruki Miyamoto, Andree Wibowo, Mark Osowski, Christopher Youtsey, David McCallum
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Patent number: 9315267Abstract: Some embodiments include a kit for increasing endurance of a battery-powered unmanned aerial vehicle (UAV) by incorporating flexible solar cells or applying flexible solar cells on a surface of a UAV or on a surface of a component of a UAV. The kit further include a power conditioning system configured to operate the solar cells within a desired power range and configured to provide power having a voltage compatible with an electrical system of the UAV.Type: GrantFiled: February 15, 2013Date of Patent: April 19, 2016Assignee: MICROLINK DEVICES, INC.Inventors: Noren Pan, Raymond Chan, Haruki Miyamoto, Andree Wibowo, Mark Osowski, Christopher Youtsey, David McCallum
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Publication number: 20130285440Abstract: Some embodiments include a kit for increasing endurance of a battery-powered unmanned aerial vehicle (UAV) by incorporating flexible solar cells or applying flexible solar cells on a surface of a UAV or on a surface of a component of a UAV. The kit further include a power conditioning system configured to operate the solar cells within a desired power range and configured to provide power having a voltage compatible with an electrical system of the UAV.Type: ApplicationFiled: February 15, 2013Publication date: October 31, 2013Inventors: Noren Pan, Raymond Chan, Haruki Miyamoto, Andree Wibowo, Mark Osowski, Christopher Youtsey, David McCallum
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Publication number: 20110318866Abstract: The present invention utilizes epitaxial lift-off in which a sacrificial layer is included in the epitaxial growth between the substrate and a thin film III-V compound solar cell. To provide support for the thin film III-V compound solar cell in absence of the substrate, a backing layer is applied to a surface of the thin film compound solar cell before it is separated from the substrate. To separate the thin film compound solar cell from the substrate, the sacrificial layer is removed as part of the epitaxial lift-off. Once the substrate is separated from the thin film III-V compound solar cell, the substrate may then be reused in the formation of another thin film compound solar cell.Type: ApplicationFiled: June 21, 2011Publication date: December 29, 2011Applicant: MICROLINK DEVICES, INC.Inventors: Noren PAN, Glen HILLIER, Duy Phach VU, Rao TATAVARTI, Christopher YOUTSEY, David MCCALLUM, Genevieve MARTIN
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Patent number: 7994419Abstract: The present invention utilizes epitaxial lift-off in which a sacrificial layer is included in the epitaxial growth between the substrate and a thin film III-V compound solar cell. To provide support for the thin film III-V compound solar cell in absence of the substrate, a backing layer is applied to a surface of the thin film III-V compound solar cell before it is separated from the substrate. To separate the thin film III-V compound solar cell from the substrate, the sacrificial layer is removed as part of the epitaxial lift-off. Once the substrate is separated from the thin film III-V compound solar cell, the substrate may then be reused in the formation of another thin film III-V compound solar cell.Type: GrantFiled: July 3, 2008Date of Patent: August 9, 2011Assignee: MicroLink Devices, Inc.Inventors: Noren Pan, Glen Hillier, Duy Phach Vu, Rao Tatavarti, Christopher Youtsey, David McCallum, Genevieve Martin
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Patent number: 7583900Abstract: An optical transceiver converting and coupling an information-containing electrical signal with an optical fiber including a housing conforming to the industry standard XENPAKâ„¢ form factor including an electrical connector for coupling with an external electrical cable or information system device and for transmitting and/or receiving an information-containing electrical communications signal, and a fiber optic connector adapted for coupling with an external optical fiber for transmitting and/or receiving an optical communications signal. At least one electro-optical subassembly is provided in the housing for converting between an information-containing electrical signal and a modulated optical signal corresponding to the electrical signal, along with a modular, interchangeable communications protocol processing printed circuit board in the housing for processing the communications signal into a predetermined electrical or optical communications protocol, such as the IEEE 802.Type: GrantFiled: March 14, 2008Date of Patent: September 1, 2009Assignee: Emcore CorporationInventors: John Dallesasse, Joseph Scheibenreif, Bryan Noble, Thomas Whitehead, Paul Wachtel, Bogdan Andrei, Dean Richardson, Brett Lane, Anthony Moretti, David McCallum
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Publication number: 20090044860Abstract: The present invention utilizes epitaxial lift-off in which a sacrificial layer is included in the epitaxial growth between the substrate and a thin film III-V compound solar cell. To provide support for the thin film III-V compound solar cell in absence of the substrate, a backing layer is applied to a surface of the thin film III-V compound solar cell before it is separated from the substrate. To separate the thin film III-V compound solar cell from the substrate, the sacrificial layer is removed as part of the epitaxial lift-off. Once the substrate is separated from the thin film III-V compound solar cell, the substrate may then be reused in the formation of another thin film III-V compound solar cell.Type: ApplicationFiled: July 3, 2008Publication date: February 19, 2009Applicant: MicroLink Devices, Inc.Inventors: Noren Pan, Glen Hillier, Duy Phach Vu, Rao Tatavarti, Christopher Youtsey, David McCallum
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Publication number: 20090038678Abstract: The present invention utilizes epitaxial lift-off in which a sacrificial layer is included in the epitaxial growth between the substrate and a thin film III-V compound solar cell. To provide support for the thin film III-V compound solar cell in absence of the substrate, a backing layer is applied to a surface of the thin film III-V compound solar cell before it is separated from the substrate. To separate the thin film III-V compound solar cell from the substrate, the sacrificial layer is removed as part of the epitaxial lift-off. Once the substrate is separated from the thin film III-V compound solar cell, the substrate may then be reused in the formation of another thin film III-V compound solar cell.Type: ApplicationFiled: July 3, 2008Publication date: February 12, 2009Applicant: MicroLink Devices, Inc.Inventors: Noren Pan, Glen Hillier, Duy Phach Vu, Rao Tatavarti, Christopher Youtsey, David McCallum
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Patent number: D699901Type: GrantFiled: May 14, 2013Date of Patent: February 18, 2014Assignee: American Valley PetInventors: Scott David McCallum, Bophet Inthivong