Patents by Inventor Craig E. Mar

Craig E. Mar 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).

  • Patent number: 11141597
    Abstract: A leadless biostimulator including an attachment feature to facilitate precise manipulation during delivery or retrieval is described. The attachment feature can be monolithically formed from a rigid material, and includes a base, a button, and a stem interconnecting the base to the button. The stem is a single post having a transverse profile extending around a central axis. The transverse profile can be annular and can surround the central axis. The leadless biostimulator includes a battery assembly having a cell can that includes an end boss. A tether recess in the end boss is axially aligned with a face port in the button to receive tethers of a delivery or retrieval system through an inner lumen of the stem. The attachment feature can be mounted on and welded to the cell can at a thickened transition region around the end boss. Other embodiments are also described and claimed.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: October 12, 2021
    Assignee: Pacesetter, Inc.
    Inventors: Thomas B. Eby, Benjamin F. James, IV, Kavous Sahabi, Travis Lieber, Arees Garabed, Craig E. Mar, Sondra Orts, Tyler J. Strang, Jennifer Heisel, Bernhard Arnar, Daniel Coyle, Daniel Goodman, Scott Smith, Scott Kerns, David Rickheim, Adam Weber, Mike Sacha, Byron Liehwah Chun
  • Publication number: 20210260389
    Abstract: A biostimulator, such as a leadless cardiac pacemaker, having a patch antenna integrated into a housing, is described. The housing includes an annular wall that contains electronic circuitry of the biostimulator and provides a ground plane of the antenna. The patch antenna includes a meandering trace embedded in a curved dielectric layer that is mounted on the annular wall. The trace provides a conductor of the antenna and the dielectric layer provides a dielectric substrate of the antenna between the conductor and the ground plane. The electronic circuitry contained within the annular wall is electrically connected to the trace via an electrical feedthrough that passes through the annular wall and the dielectric layer. The electrical feedthrough places the electronic circuitry in communication with the antenna to transmit or receive wireless communication signals from an external device. Other embodiments are also described and claimed.
    Type: Application
    Filed: February 22, 2021
    Publication date: August 26, 2021
    Inventors: Souvik Dubey, Perry Li, Craig E. Mar
  • Publication number: 20200254269
    Abstract: A biostimulator, such as a leadless cardiac pacemaker, including a fixation element that can be locked to a helix mount, is described. The fixation element includes a fastener that engages a keeper of the helix mount. When engaged with the keeper, the fastener locks the fixation element to the helix mount. Accordingly, the fixation element does not move relative to the helix mount when the biostimulator is delivered into a target tissue. Other embodiments are also described and claimed.
    Type: Application
    Filed: February 7, 2020
    Publication date: August 13, 2020
    Inventor: Craig E. Mar
  • Publication number: 20200054883
    Abstract: A leafless biostimulator, such as a leadless pacemaker, includes a housing sized and configured to be implanted within a heart of a patient and includes both primary and secondary fixation features. The primary fixation feature is adapted to rotate to fix the leadless biostimulator to a wall of the heart during initial implantation. Once the leadless biostimulator is implanted, the secondary fixation feature is adapted to resist counter-rotation of the leadless biostimulator. The primary fixation feature may include a fixation helix configured to affix the housing to the heart by rotating in a screwing direction. The secondary fixation feature may include an apex to engage the heart to resist unscrewing of the primary fixation feature.
    Type: Application
    Filed: August 14, 2019
    Publication date: February 20, 2020
    Inventors: Thomas B. Eby, Christopher R. Jenney, Craig E. Mar, Paul M. Paspa
  • Publication number: 20190275340
    Abstract: A leadless biostimulator including an attachment feature to facilitate precise manipulation during delivery or retrieval is described. The attachment feature can be monolithically formed from a rigid material, and includes a base, a button, and a stem interconnecting the base to the button. The stem is a single post having a transverse profile extending around a central axis. The transverse profile can be annular and can surround the central axis. The leadless biostimulator includes a battery assembly having a cell can that includes an end boss. A tether recess in the end boss is axially aligned with a face port in the button to receive tethers of a delivery or retrieval system through an inner lumen of the stem. The attachment feature can be mounted on and welded to the cell can at a thickened transition region around the end boss. Other embodiments are also described and claimed.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 12, 2019
    Inventors: Thomas B. Eby, Benjamin F. James, IV, Kavous Sahabi, Travis Lieber, Arees Garabed, Craig E. Mar, Sondra Orts, Tyler J. Strang, Jennifer Heisel, Bernhard Arnar, Daniel Coyle, Daniel Goodman, Scott Smith, Scott Kerns, David Rickheim, Adam Weber, Mike Sacha, Byron Liehwah Chun
  • Publication number: 20190134413
    Abstract: A biostimulator, such as a leadless cardiac pacemaker, including a fixation element to engage tissue and one or more backstop elements to resist back-out from the tissue, is described. The fixation element can be mounted on a housing of the biostimulator such that a helix of the fixation element extends distally to a leading point. The leading point can be located on a distal face of the helix at a position that is proximal from a center of the distal face. The backstop elements can include non-metallic filaments, such as sutures, or can include a pinch point of the biostimulator. The backstop features can grip the tissue to prevent unscrewing of the fixation element. Other embodiments are also described and claimed.
    Type: Application
    Filed: November 5, 2018
    Publication date: May 9, 2019
    Inventors: Craig E. Mar, Thomas B. Eby, Paul Paspa, Sondra Orts, Matthew G. Fishler, Stephen Lee, Carl Lance Boling, Thomas Robert Luhrs
  • Patent number: 5746616
    Abstract: A method for electrically attaching electrode wire to a conductor in a defibrillation lead is disclosed. The method comprises melting the end of the wire with a hydrogen torch to form a ball of metal, then crimping or welding the ball to the conductor or to a joining piece attached to the conductor. Also, a hydrogen torch (water welder) may be used to join two or more electrode wires to each other.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: May 5, 1998
    Assignee: Pacesetter, Inc.
    Inventor: Craig E. Mar
  • Patent number: 5674272
    Abstract: The present invention is directed toward providing a composite lead body design for pacing and defibrillation leads. This lead body design improves the lead crush resistance in the lead segment that is implanted in the patient's clavicular region, while maintaining good fatigue resistance in the lead segment implanted in the heart. The clavicular segment has a generally flat profile. By flattening the clavicular segment proximal to the venous entry site, the lead will have a lower profile. Also, by substantially co-aligning the conductors within the clavicular segment, the crush resistance of the lead is significantly improved.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: October 7, 1997
    Assignee: Ventritex, Inc.
    Inventors: M. Elizabeth Bush, Craig E. Mar, Peter A. Altman, Paul M. Paspa
  • Patent number: 5542173
    Abstract: An implantable defibrillator lead comprises a flexible core onto which is wound helically wound coils to form an electrode. These electrode coils are partially encapsulated by a flexible matrix which holds them in their wrapped position around the core. Due to its coiled coil structure, this electrode provides improved flexibility, and can be used endocardially, intravascularly, epicardially, or subcutaneously. The electrode may function alternately as a defibrillation electrode and as a sensing electrode in a lead with a separate pacing electrode.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: August 6, 1996
    Assignee: Ventritex, Inc.
    Inventors: Craig E. Mar, Benjamin D. Pless, M. Elizabeth Bush
  • Patent number: 5488768
    Abstract: A method for electrically attaching electrode wire to a conductor in a defibrillation lead is disclosed. The method comprises melting the end of the wire with a hydrogen torch to form a ball of metal, then crimping or welding the ball to the conductor or to a joining piece attached to the conductor. Also, a hydrogen torch (water welder) may be used to join two or more electrode wires to each other.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: February 6, 1996
    Assignee: Ventritex, Inc.
    Inventor: Craig E. Mar
  • Patent number: 5483022
    Abstract: An implantable lead conductor comprises at least one helical coil formed from at least one electrical cable. Each cable is formed from several wires twisted in a ropelike configuration with at least some of the wires being helically wound around a central axis of the cable. Each wire is a composite comprising a core of a first material and a coveting of a second material, with all adjacent wires belonging to the same cable in uninsulated contact with each other. Preferably, the core material is highly conductive, and the covering material is strong and biocompatible. The helical coil has a lumen for insertion of a stylet to facilitate insertion through a vein.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: January 9, 1996
    Assignee: Ventritex, Inc.
    Inventor: Craig E. Mar
  • Patent number: 5439485
    Abstract: An implantable defibrillator lead comprises a flexible core onto which is wound helically wound coils to form an electrode. These electrode coils are partially encapsulated by a flexible matrix which holds them in their wrapped position around the core. Due to its coiled coil structure, this electrode provides improved flexibility, and can be used endocardially, intravascularly, epicardially, or subcutaneously. The electrode may function alternately as a defibrillation electrode and as a sensing electrode in a lead with a separate pacing electrode.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: August 8, 1995
    Assignee: Ventritex, Inc.
    Inventors: Craig E. Mar, Benjamin D. Pless, M. Elizabeth Bush
  • Patent number: 5411544
    Abstract: An implantable cardiac defibrillation lead is provided in which surface modification and deposition techniques are utilized to provide improved electrical and mechanical characteristics. The surface of an electrode can thereby be matched to the heart tissue for biocompatibility while at the same time providing for the appropriate electrical and mechanical characteristics of the electrode material.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: May 2, 1995
    Assignee: Ventritex, Inc.
    Inventors: Craig E. Mar, M. Elizabeth Bush, Benjamin D. Pless
  • Patent number: 5330524
    Abstract: An implantable cardiac defibrillation electrode is provided, in which there is an electrically conductive wire mesh formed of crossed spirally wound cables. Each of the spirally wound cables comprises a plurality of stranded wire elements, with a central wire element and a plurality of outer wire elements wound adjacent the central wire element. In one embodiment, the crossed cables are formed in a twill weave pattern, alternating over and under at least two individual cables.
    Type: Grant
    Filed: June 17, 1993
    Date of Patent: July 19, 1994
    Assignee: Ventritex, Inc.
    Inventor: Craig E. Mar
  • Patent number: 5282845
    Abstract: An implantable defibrillator lead comprises a flexible, conductive lead member having proximal and distal end portions. The distal end portion defines a plurality of separate, curvilinear electrodes which naturally extend laterally outwardly in a curved arrangement from the remainder of the lead. However, by desired means, the curvilinear electrodes may be temporarily extended out straight, substantially parallel to the axis of the remainder of said lead member, to facilitate implantation of the lead. This may be preferably accomplished by a flexible sheath that encloses the lead member in longitudinally slidable relation.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: February 1, 1994
    Assignee: Ventritex, Inc.
    Inventors: Mary E. Bush, Craig E. Mar, Eric S. Fain
  • Patent number: 5042985
    Abstract: A steerable balloon dilatation catheter which is particularly suitable for peripheral arteries having an elongated tubular member with a flexible, inelastic balloon on the distal end. The tubular member has a relatively stiff proximal portion formed of stainless steel and a relatively flexible distal portion formed of a polyester. A fixed guiding member is disposed within the catheter bonded to the proximal portion of the tubular member, to a short relatively rigid cylindrical member bonded to the distal portion of the tubular member and the distal end of the balloon.
    Type: Grant
    Filed: May 11, 1989
    Date of Patent: August 27, 1991
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Sandra L. Elliott, Jeffrey L. Kraus, Craig E. Mar
  • Patent number: RE34466
    Abstract: An extendable guidewire system for introducing a dilatation catheter into the cardiovascular system. The guidewire has guidewire and extension sections with a connection therebetween which permits the two sections to be joined together and separated simply by pushing the two sections together and pulling them apart. One of the sections can be used for positioning the catheter within the cardiovascular system, and the other section can be employed to extend the wire to change catheters.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: December 7, 1993
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Charles S. Taylor, Robert M. Abrams, Kirsten L. Messner, Beverly Huss, Craig E. Mar, Jeffrey L. Kraus, Linda T. Guthrie
  • Patent number: RE34564
    Abstract: Low profile dilatation catheter having an elongate flexible tubular member with proximal and distal extremities and with a flow passage extending therethrough. An inflatable balloon is mounted on the distal extremity of the elongate flexible tubular member so that the balloon has its interior in communication with the flow passage in the tubular member. A flexible tip is secured to the distal extremity of the balloon. A core wire extends through the elongate flexible member and has proximal and distal extremities. The distal extremity of the core wire is tapered and extends through the balloon and into the flexible tip. The distal extremity of the core wire is secured to the flexible tip. A rotator is provided for rotating the proximal extremity of the core wire for causing rotation of the flexible tip. Self-venting means is provided for venting the balloon to ambient. An adapter is carried by the proximal extremity of the elongate tubular member.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: March 15, 1994
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Craig E. Mar, Jeffrey S. Frisbie
  • Patent number: RE34695
    Abstract: Torsionally stabilized guide wire for use in larger vessels of the vascular system. A relatively flexible helical coil is positioned over the distal end portion of an elongated shaft which increases in flexibility toward its distal end. The coil is affixed to the shaft at the proximal and distal ends of the coil and at an intermediate point near the distal end. A jacket having an outer diameter substantially equal to the outer diameter of the coil covers the shaft between the proximal end of the shaft and the proximal end of the coil. In one disclosed embodiment, the jacket is formed by heat shrinking a tubular sleeve of polyethylene about the shaft.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: August 16, 1994
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Craig E. Mar, Lambert J. Diettrich, David W. Morrison
  • Patent number: D894396
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: August 25, 2020
    Assignee: PACESETTER, INC.
    Inventors: Jennifer Heisel, Craig E. Mar, Benjamin F. James, IV, Bernhard Arnar, Daniel Coyle, Daniel Goodman, Scott Smith, Scott Kerns, David Rickheim, Adam Weber, Mike Sacha, Byron Liehwah Chun