Patents by Inventor Robert W. Gray
Robert W. Gray 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: 20080132986Abstract: An implantable medical assist device includes a medical device. The medical device has a housing and electronics contained therein. A lead provides an electrical path to or from the electronics within the medical device. A resonance tuning module is located in the housing and is connected to the lead. The resonance tuning module includes a control circuit for determining a resonant frequency of the implantable medical assist device and an adjustable impedance circuit to change the combined resonant frequency of the medical device and lead.Type: ApplicationFiled: October 29, 2007Publication date: June 5, 2008Applicant: MEDTRONIC, INC.Inventors: Robert W. GRAY, Stuart G. MacDONALD
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Patent number: 7344559Abstract: A medical device includes a pattern of electrically conductive material. The pattern of electrically conductive material has an anti-antenna geometrical shape such that the anti-antenna geometrical shape substantially prevents the medical device from creating an imaging artifact and/or substantially allows imaging of a volume within the medical device. The pattern may be formed by multiple “figure-8” shaped electrical conductors, multiple “figure-8” emulating electrical conductors, multiple sine-wave-like shaped electrical conductors, multiple zig-zag patterned electrical conductors, by multiple electrical conductors, each having sequential conductive loops, and/or a single conductor weaved into a loop mesh. The electrically conductive material may be titanium, tantalum, nitinol, stainless steel, and/or NbZr.Type: GrantFiled: August 20, 2004Date of Patent: March 18, 2008Assignee: Biophan Technologies, Inc.Inventors: Robert W. Gray, Stuart G. MacDonald, Jeffrey L. Helfer
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Patent number: 7123013Abstract: A voltage compensation unit reduces the effects of induced voltages upon a device having a single wire line. The single wire line has balanced characteristic impedance. The voltage compensation unit includes a tunable compensation circuit connected to the wire line. The tunable compensation circuit applies supplemental impedance to the wire line. The supplemental impedance causes the characteristic impedance of the wire line to become unbalanced, thereby reducing the effects of induced voltages caused by changing magnetic fields.Type: GrantFiled: July 8, 2004Date of Patent: October 17, 2006Assignee: Biophan Technologies, Inc.Inventor: Robert W. Gray
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Patent number: 6980848Abstract: An assembly for delivering optical signals comprising a nuclear magnetic resonance system; an optical interface assembly electrically connected to the nuclear magnetic resonance system, the optical interface assembly comprising a first laser for producing laser optical signals, an interface optical to electrical signal convertor, and an interface optical connector assembly; and a catheter assembly comprising a proximal end, a distal end, and a catheter optical connector assembly disposed at the proximal end and connected to the interface optical connector assembly of the optical interface assembly, a fiber optic cable assembly, an electronics assembly disposed at the distal end comprised of a catheter electrical to optical signal convertor and a catheter optical to electrical signal convertor, and a first receiving coil disposed at the distal end.Type: GrantFiled: May 2, 2005Date of Patent: December 27, 2005Assignee: Biopham Technologies Inc.Inventors: Jeffrey L. Helfer, Stuart G. MacDonald, Robert W. Gray, Christopher Thomas
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Patent number: 6971391Abstract: An assembly for protecting biological tissue from the effects of heating. The assembly contains a conductor in contact with the biological tissue and forming an electrical circuit comprising the biological tissue. The assembly contains a device for modifying the impedance of the electrical circuit such that, at a frequency of from about 10 megahertz to about 150 megahertz, such impedance is at least about 0.5 ohms per centimeter of length of said conductor. The assembly also contains a device for limiting the flow of current through the biological tissue such that, when the assembly is exposed to an alternating current electromagnetic field at a frequency of 64 megahertz and a magnetic field strength of 1.5 Tesla for 15 minutes, the temperature of the biological tissue does not exceed 42 degrees Celsius.Type: GrantFiled: February 24, 2003Date of Patent: December 6, 2005Assignee: Nanoset, LLCInventors: Xingwu Wang, Howard J. Greenwald, Jeffrey L. Helfer, Robert W. Gray
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Patent number: 6949929Abstract: A voltage compensation unit reduces the effects of induced voltages upon a device having a single wire line. The single wire line has balanced characteristic impedance. The voltage compensation unit includes a tunable compensation circuit connected to the wire line. The tunable compensation circuit applies supplemental impedance to the wire line. The supplemental impedance causes the characteristic impedance of the wire line to become unbalanced, thereby reducing the effects of induced voltages caused by changing magnetic fields.Type: GrantFiled: February 17, 2004Date of Patent: September 27, 2005Assignee: Biophan Technologies, Inc.Inventors: Robert W. Gray, Paul G. Simpson, III, Michael L. Weiner
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Patent number: 6925322Abstract: An assembly for delivering optical signals that has a nuclear magnetic resonance system, an optical interface assembly, and a catheter assembly with a fiber optic cable assembly and an optical interface and an antenna. The catheter assembly converts electromagnetic signals received by the antenna into optical signals. The optical interface assembly converts optical signals into electrical signals and electrical signals into optical signals.Type: GrantFiled: July 25, 2002Date of Patent: August 2, 2005Assignee: Biophan Technologies, Inc.Inventors: Jeffrey L. Helfer, Stuart G. MacDonald, Robert W. Gray, Christopher Thomas
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Publication number: 20040263174Abstract: A voltage compensation unit reduces the effects of induced voltages upon a device having a single wire line. The single wire line has balanced characteristic impedance. The voltage compensation unit includes a tunable compensation circuit connected to the wire line. The tunable compensation circuit applies supplemental impedance to the wire line. The supplemental impedance causes the characteristic impedance of the wire line to become unbalanced, thereby reducing the effects of induced voltages caused by changing magnetic fields.Type: ApplicationFiled: July 8, 2004Publication date: December 30, 2004Applicant: Biophan Technologies, Inc.Inventors: Robert W. Gray, Stuart G. MacDonald
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Publication number: 20040263173Abstract: A voltage compensation unit reduces the effects of induced voltages upon a device having a single wire line. The single wire line has balanced characteristic impedance. The voltage compensation unit includes a tunable compensation circuit connected to the wire line. The tunable compensation circuit applies supplemental impedance to the wire line. The supplemental impedance causes the characteristic impedance of the wire line to become unbalanced, thereby reducing the effects of induced voltages caused by changing magnetic fields.Type: ApplicationFiled: July 8, 2004Publication date: December 30, 2004Applicant: Biophan Technologies, Inc.Inventor: Robert W. Gray
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Publication number: 20040263172Abstract: A voltage compensation unit reduces the effects of induced voltages upon a device having a single wire line. The single wire line has balanced characteristic impedance. The voltage compensation unit includes a tunable compensation circuit connected to the wire line. The tunable compensation circuit applies supplemental impedance to the wire line. The supplemental impedance causes the characteristic impedance of the wire line to become unbalanced, thereby reducing the effects of induced voltages caused by changing magnetic fields.Type: ApplicationFiled: February 17, 2004Publication date: December 30, 2004Applicant: Biophan Technologies, Inc.Inventors: Robert W. Gray, Paul G. Simpson, Michael L. Weiner
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Publication number: 20040225213Abstract: An assembly for shielding an implanted medical device from the effects of high-frequency radiation and for emitting magnetic resonance signals during magnetic resonance imaging. The assembly includes an implanted medical device and a magnetic shield comprised of nanomagnetic material disposed between the medical device and the high-frequency radiation. In one embodiment, the magnetic resonance signals are detected by a receiver, which is thus able to locate the implanted medical device within a biological organism.Type: ApplicationFiled: May 3, 2004Publication date: November 11, 2004Inventors: Xingwu Wang, Howard J. Greenwald, Jeffrey L. Helfer, Robert W. Gray, Michael L. Weiner
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Patent number: 6793642Abstract: A flow cytometer containg a device for sampling cellular material within a body, comprising. The flow cytometer is adapted to mark cells within bodily fluid with a marker to produce marked cells, to analyze the marked cells, to sort the cells within the bodily fluid to produce sorted cells, and to maintain the sorted cells cells in a viable state.Type: GrantFiled: July 30, 2001Date of Patent: September 21, 2004Assignee: Biomed Solutions, LLCInventors: Patrick R. Connelly, Stuart G. MacDonald, Robert W. Gray, Carol Gebert
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Patent number: 6765144Abstract: An assembly for shielding an implanted medical device from the effects of high-frequency radiation and for emitting magnetic resonance signals during magnetic resonance imaging. The assembly includes an implanted medical device and a magnetic shield comprised of nanomagnetic material disposed between the medical device and the high-frequency radiation. In one embodiment, the magnetic resonance signals are detected by a receiver, which is thus able to locate the implanted medical device within a biological organism.Type: GrantFiled: March 7, 2003Date of Patent: July 20, 2004Assignee: Nanoset, LLCInventors: Xingwu Wang, Howard J. Greenwald, Jeffrey L. Helfer, Robert W. Gray, Michael L. Weiner
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Publication number: 20040116800Abstract: A catheter assembly which is provided with a distally positioned magnetic resonance imaging coil, comprising a cable assembly having a proximal end and a distal end, the cable assembly further comprising an outer tube, a first electronics assembly disposed within the distal end of the cable assembly, a first fiber optic strand disposed within the tube, and connected to the first electronic assembly; and a tip assembly connected to the distal end of the cable assembly further comprising a thin structural wall forming a cavity, and a coil assembly disposed within the cavity. The catheter assembly enables high resolution magnetic resonance imaging of tissue proximate to the assembly, as well as other beneficial diagnostic and therapeutic procedures.Type: ApplicationFiled: February 19, 2003Publication date: June 17, 2004Inventors: Jeffrey L. Helfer, Robert W. Gray, Michael L. Weiner
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Patent number: 6743190Abstract: A flow cytometer containg a device for sampling cellular material within a body. The flow cytometer is adapted to mark cells within bodily fluid with a marker to produce marked cells, to analyze the marked cells, to sort the cells within the bodily fluid to produce sorted cells, to maintain the sorted cells cells in a viable state, and to remove the marker from the marked cells. Two marker removal devices are used in the flow cytomter.Type: GrantFiled: July 30, 2001Date of Patent: June 1, 2004Assignee: Biomed Solutions L.L.C.Inventors: Patrick R. Connelly, Stuart G. MacDonald, Robert W. Gray, Carol Gebert
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Patent number: 6700127Abstract: An apparatus for producing an electron beam, containing a vacuum chamber, a source of electron beams within the vacuum chamber, and a device for focusing the electrons beams. An electron transparent window is formed at the end of the vacuum chamber; and the vacuum chamber has a volume of less than about 1 cubic millimeter and a pressure of less than 10−7 Torr. In one embodiment, the focusing device is located outside of the vacuum chamber.Type: GrantFiled: January 9, 2002Date of Patent: March 2, 2004Assignee: Biomed Solutions LLCInventors: Conrad W. Schneiker, Stuart Hameroff, Robert W. Gray
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Patent number: 6695761Abstract: An implantable apparatus for treating a heart of a living organism which contains a device for withdrawing blood from the heart, for imparting helical flow to the blood, for recording at least one energy characteristic of the heart, and for imparting energy to the living organism.Type: GrantFiled: January 30, 2002Date of Patent: February 24, 2004Assignee: Biomed Solutions, LLCInventors: James L. Oschman, Robert W. Gray
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Publication number: 20040019273Abstract: An assembly for delivering optical signals that has a nuclear magnetic resonance system, an optical interface assembly, and a catheter assembly with a fiber optic cable assembly and an optical interface and an antenna. The catheter assembly converts electromagnetic signals received by the antenna into optical signals. The optical interface assembly converts optical signals into electrical signals and electrical signals into optical signals.Type: ApplicationFiled: July 25, 2002Publication date: January 29, 2004Inventors: Jeffrey L. Helfer, Stuart G. MacDonald, Robert W. Gray, Christopher Thomas
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Publication number: 20030144572Abstract: An implantable apparatus for treating a heart of a living organism which contains a device for withdrawing blood from the heart, for imparting helical flow to the blood, for recording at least one energy characteristic of the heart, and for imparting energy to the living organism.Type: ApplicationFiled: January 30, 2002Publication date: July 31, 2003Inventors: James L. Oschman, Robert W. Gray
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Publication number: 20030127594Abstract: An apparatus for producing an electron beam, containing a vacuum chamber, a source of electron beams within the vacuum chamber, and a device for focusing the electrons beams. An electron transparent window is formed at the end of the vacuum chamber; and the vacuum chamber has a volume of less than about 1 cubic millimeter and a pressure of less than 10−7 Torr. In one embodiment, the focusing device is located outside of the vacuum chamber.Type: ApplicationFiled: January 9, 2002Publication date: July 10, 2003Inventors: Conrad W. Schneiker, Stuart Hameroff, Robert W. Gray