Patents by Inventor Gregory P. Carman
Gregory P. Carman 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: 11791566Abstract: A multiferroic antenna apparatus and method are described which provides increased energy efficiencies and ease of implementation. Magnetoelastic and/or magnetostrictive resonator are coupled to a piezoelectric substrate, along with electrodes coupled to its opposing surfaces. In receive mode the resonators create mechanical waves in response to being excited into magnetic oscillation by receiving electromagnetic radiation, and these mechanical waves coupled to the piezoelectric substrate causing it to generate an electrical output signal at said electrodes. In transmit mode an electrical signal coupled through the electrodes induces mechanical waves in the piezoelectric substrate directed to the resonators which are excited into magnetic oscillation to output electromagnetic waves.Type: GrantFiled: February 4, 2021Date of Patent: October 17, 2023Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Abdon E. Sepulveda, Gregory P. Carman, Jinzhao Hu, Joseph Devin Schneider, Elmer Wu, Zhi Yao, Sidhant Tiwari, Wenzhong Yan
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Publication number: 20210242606Abstract: A multiferroic antenna apparatus and method are described which provides increased energy efficiencies and ease of implementation. Magnetoelastic and/or magnetostrictive resonator are coupled to a piezoelectric substrate, along with electrodes coupled to its opposing surfaces. In receive mode the resonators create mechanical waves in response to being excited into magnetic oscillation by receiving electromagnetic radiation, and these mechanical waves coupled to the piezoelectric substrate causing it to generate an electrical output signal at said electrodes. In transmit mode an electrical signal coupled through the electrodes induces mechanical waves in the piezoelectric substrate directed to the resonators which are excited into magnetic oscillation to output electromagnetic waves.Type: ApplicationFiled: February 4, 2021Publication date: August 5, 2021Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Abdon E. Sepulveda, Gregory P. Carman, Jinzhao Hu, Joseph Devin Schneider, Elmer Wu, Zhi Yao, Sidhant Tiwari, Wenzhong Yan
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Patent number: 10218072Abstract: An antenna apparatus utilizing bulk acoustic wave (BAW) resonances to transfer dynamic strain across multiple layers, which include piezoelectric layers coupled to magnetostrictive material layers. In at least one embodiment, a piezoelectric layer is coupled to a magnetostrictive layer to which another layer having similar acoustic properties as the piezoelectric layer is coupled as an inertial buffer. These multiple layers comprise a strain media to provide a vertical multiferroic coupling which couples electric field, magnetic field, and mechanical fields. Electrodes are coupled to excite one of the piezoelectric layers for injecting acoustic waves into the structure from which electromagnetic radiation is generated out of the plane.Type: GrantFiled: June 2, 2016Date of Patent: February 26, 2019Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Yuanxun Ethan Wang, Gregory P. Carman, Robert Norris Candler, Scott Keller
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Publication number: 20180115070Abstract: An antenna apparatus utilizing bulk acoustic wave (BAW) resonances to transfer dynamic strain across multiple layers, which include piezoelectric layers coupled to magnetostrictive material layers. In at least one embodiment, a piezoelectric layer is coupled to a magnetostrictive layer to which another layer having similar acoustic properties as the piezoelectric layer is coupled as an inertial buffer. These multiple layers comprise a strain media to provide a vertical multiferroic coupling which couples electric field, magnetic field, and mechanical fields. Electrodes are coupled to excite one of the piezoelectric layers for injecting acoustic waves into the structure from which electromagnetic radiation is generated out of the plane.Type: ApplicationFiled: June 2, 2016Publication date: April 26, 2018Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Yuanxun Ethan Wang, Gregory P. Carman, Robert Norris Candler, Scott Keller
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Patent number: 9833309Abstract: A vascular implant, comprising a sheet comprising thin film nickel titanium (NiTi), wherein the sheet has at least one super-hydrophilic surface having a water contact angle of less than approximately 5 degrees. The sheet is configured to have a compacted form having a first internal diameter and a deployed form having a second internal diameter larger than the first internal diameter. The sheet may be delivered into a blood vessel in the compacted form and expanded to its deployed form at a treatment location within the blood vessel, wherein the stent is configured to expand onto an internal surface of the blood vessel and exert a radial force on said internal surface.Type: GrantFiled: September 1, 2011Date of Patent: December 5, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Daniel S. Levi, Gregory P. Carman, Youngjae Chun, Fernando Vinuela
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Patent number: 9730783Abstract: A flow diverter is described and fabricated using ultra-thin porous thin-film Nitinol, and is configured for implantation to a treatment site within a vessel for significant reduction in an intra-aneurismal flow velocity and vorticity. Using small size pores in a coverage area of only 10%, a 90% reduction in flow velocity into a pseudo-aneurysm can be achieved, with an almost immediate cessation of flow into an anatomical feature such as aneurysm sac in vivo. The size of the holes can be tailored to be any shape and range in size from 1-400 ?m using photolithography and from 5-1000 nm using ebeam lithography.Type: GrantFiled: November 3, 2012Date of Patent: August 15, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Gregory P. Carman, Daniel S. Levi, Youngjae Chun, Fernando Vinuela
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Patent number: 9685214Abstract: Devices and methods for controlling magnetic anisotropy and orientation of magnetic single domain structures between stable states are provided based on piezoelectric thin films and patterned electrodes. By using patterned electrodes, piezoelectric strain is manipulated to achieve a highly localized biaxial strain in a piezoelectric substrate and rotate the magnetic anisotropy of magnetic materials. Reorientation of a magnetic single domain between different stable states is accomplished by pulsing voltage across pairs of electrodes. Since only a small region surrounding the electrodes is strained, the methods can be applied to arrays of indexed magnetic elements and to piezoelectric thin films clamped to silicon base substrates.Type: GrantFiled: June 15, 2015Date of Patent: June 20, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Christopher S. Lynch, Jizhai Cui, Joshua Hockel, Gregory P. Carman
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Publication number: 20170095357Abstract: The various embodiments described herein include methods for fabricating thin- film flow diversion apparatuses. In one aspect, a method includes: (1) creating a plurality of trenches using photolithography and deep reactive ion etching on a substrate; (2) depositing a metal sacrificial layer on the substrate; (3) forming a Nitinol layer with a plurality of fenestrations by depositing Nitinol on the metal sacrificial layer; (4) forming a thin-film of Nitinol by removing the metal sacrificial layer; (5) crystallizing the thin-film of Nitinol; and (6) elongating the thin-film of Nitinol.Type: ApplicationFiled: December 21, 2016Publication date: April 6, 2017Inventors: Gregory P. Carman, Daniel S. Levi, Youngjae Chun, Fernando Vinuela
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Patent number: 9524709Abstract: A multiferroic transducer for an electrical stringed-instrument pickup comprising an upper layer and lower layer of magnetostrictive material and a middle layer of piezoelectric or ferroelectric material disposed between the upper layer and lower layer.Type: GrantFiled: October 21, 2015Date of Patent: December 20, 2016Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Gregory P. Carman, Paul K. Nordeen
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Patent number: 9355764Abstract: A magnetoelectric composite device having a free (i.e. switchable) layer of ferromagnetic nanocrystals mechanically coupled a ferroelectric single crystal substrate is presented, wherein application of an electrical field on the composite switches the magnetic state of the switchable layer from a superparamagnetic state having no overall net magnetization to a substantially single-domain ferromagnetic state.Type: GrantFiled: January 14, 2014Date of Patent: May 31, 2016Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Sarah H. Tolbert, Gregory P. Carman, Scott Keller, Laura Schelhas, Hyungsuk Kim, Joshua Hockel
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Publication number: 20160111072Abstract: A multiferroic transducer for an electrical stringed-instrument pickup comprising an upper layer and lower layer of magnetostrictive material and a middle layer of piezoelectric or ferroelectric material disposed between the upper layer and lower layer.Type: ApplicationFiled: October 21, 2015Publication date: April 21, 2016Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Gregory P. Carman, Paul K. Nordeen
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Patent number: 9274181Abstract: The invention is a magneto-optic coupled magnetic sensor that comprises a standard optical fiber Bragg grating system. The system includes an optical fiber with at least one Bragg grating therein. The optical fiber has at least an inner core and a cladding that surrounds the inner core. The optical fiber is part of an optical system that includes an interrogation device that provides a light wave through the optical fiber and a system to determine the change in the index of refraction of the optical fiber. The cladding of the optical fiber comprises at least a portion of which is made up of ferromagnetic particles so that the ferromagnetic particles are subject to the light wave provided by the interrogation system. When a magnetic field is present, the ferromagnetic particles change the optical properties of the sensor directly.Type: GrantFiled: February 5, 2013Date of Patent: March 1, 2016Assignees: The United States of America, as Represented by the Adminstrator of NASA, The Regents of the University of CaliforniaInventors: Gregory P. Carman, Panduranga K. Mohanchandra, Michael C. Emmons, William Lance Richards
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Publication number: 20160000553Abstract: A thin film nitinol stent cover is provided that includes a plurality of fenestrations. Each fenestration extends in both longitudinal and transverse dimension, wherein the longitudinal and transverse dimensions are both less than or equal to a critical dimension that inhibits muscle cell migration through the fenestrations.Type: ApplicationFiled: February 25, 2014Publication date: January 7, 2016Inventors: Daniel S. LEVI, Gregory P. CARMAN, Youngjae CHUN, Allan W. TULLOCH, Colin KEALEY
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Publication number: 20160005949Abstract: Devices and methods for controlling magnetic anisotropy and orientation of magnetic single domain structures between stable states are provided based on piezoelectric thin films and patterned electrodes. By using patterned electrodes, piezoelectric strain is manipulated to achieve a highly localized biaxial strain in a piezoelectric substrate and rotate the magnetic anisotropy of magnetic materials. Reorientation of a magnetic single domain between different stable states is accomplished by pulsing voltage across pairs of electrodes. Since only a small region surrounding the electrodes is strained, the methods can be applied to arrays of indexed magnetic elements and to piezoelectric thin films clamped to silicon base substrates.Type: ApplicationFiled: June 15, 2015Publication date: January 7, 2016Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Christopher S. Lynch, Jizhai Cui, Joshua Hockel, Gregory P. Carman
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Patent number: 9166147Abstract: A ferroelectric device includes a first electrode, a second electrode spaced apart from the first electrode, and a ferroelectric element arranged between the first and second electrodes. The ferroelectric element has a plurality of quasistatic strain configurations that are selectable by the application of an electric field and the device has selectable electromechanical displacement by the application of the electric field.Type: GrantFiled: April 27, 2012Date of Patent: October 20, 2015Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Gregory P. Carman, Kang-Lung Wang, Tao Wu, Alexandre Bur, Pedram Khalili Amiri
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Publication number: 20140249614Abstract: A vascular implant, comprising a sheet comprising thin film nickel titanium (NiTi), wherein the sheet has at least one super-hydrophilic surface having a water contact angle of less than approximately 5 degrees. The sheet is configured to have a compacted form having a first internal diameter and a deployed form having a second internal diameter larger than the first internal diameter. The sheet may be delivered into a blood vessel in the compacted form and expanded to its deployed form at a treatment location within the blood vessel, wherein the stent is configured to expand onto an internal surface of the blood vessel and exert a radial force on said internal surface.Type: ApplicationFiled: September 1, 2011Publication date: September 4, 2014Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Daniel S. Levi, Gregory P. Carman, Youngjae Chun, Fernando Vinuela
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Publication number: 20140197910Abstract: A magnetoelectric composite device having a free (i.e. switchable) layer of ferromagnetic nanocrystals mechanically coupled a ferroelectric single crystal substrate is presented, wherein application of an electrical field on the composite switches the magnetic state of the switchable layer from a superparamagnetic state having no overall net magnetization to a substantially single-domain ferromagnetic state.Type: ApplicationFiled: January 14, 2014Publication date: July 17, 2014Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Sarah H. Tolbert, Gregory P. Carman, Scott Keller, Laura Schelhas, Hyungsuk Kim, Joshua Hockel
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Publication number: 20140042574Abstract: A ferroelectric device includes a first electrode, a second electrode spaced apart from the first electrode, and a ferroelectric element arranged between the first and second electrodes. The ferroelectric element has a plurality of quasistatic strain configurations that are selectable by the application of an electric field and the device has selectable electromechanical displacement by the application of the electric field.Type: ApplicationFiled: April 27, 2012Publication date: February 13, 2014Applicant: The Regents of the University of CaliforniaInventors: Gregory P. Carman, Kang-Lung Wang, Tao Wu, Alexandre Bur, Pedram Khalili Amiri
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Publication number: 20120267982Abstract: An energy harvesting apparatus includes an inverse frequency rectifier structured to receive mechanical energy at a first frequency, and a solid state electromechanical transducer coupled to the inverse frequency rectifier to receive a force provided by the inverse frequency rectifier. The force, when provided by the inverse frequency rectifier, causes the solid state transducer to be subjected to a second frequency that is higher than the first frequency to thereby generate electrical power. The coupling of the solid state electromechanical transducer to the inverse frequency rectifier is a non-contact coupling.Type: ApplicationFiled: December 21, 2007Publication date: October 25, 2012Applicant: The Regents of the University of CaliforniaInventors: Gregory P. Carman, Dong Gun Lee
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Patent number: 7800278Abstract: An inventive energy harvesting apparatus may include a ferromagnetic material and/or a shape memory alloys to convert thermal energy to mechanical energy to electrical energy. The apparatus is subjected to a thermal gradient to cause beams to bend thus creating stress/strain in a piezoelectric material, or creating magnetic flux in a magnetic path. The charges created in this process can be transferred to electrical batteries.Type: GrantFiled: January 24, 2007Date of Patent: September 21, 2010Assignee: The Regents of the University of CaliforniaInventors: Motoki Ujihara, Dong Gun Lee, Gregory P. Carman