Patents by Inventor Michael A. Zwolinski

Michael A. Zwolinski 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: 11950822
    Abstract: A fracture treatment system can include a pair of implants cross-pinned into the medullary canal of a bone, guided by at least one guide wire with at least two diameters. The system allows for more accurate sizing of the length of implants needed to achieve bicortical purchase for enhanced stability, as well as anti-rotation of the fracture site. The more accurate sizing and placement of the cross-pinned implants additionally allow both ends of the implants to recess beneath or be flush with the outer surface of the bone, which can reduce the risk of infection. The guide wire can allow the implants to be inserted using a cannulated technique for easier surgical procedure and better outcome, with the implants having sufficient wall thickness for the desired length to achieve bicortical purchase while keeping the shaft outer diameter of the implant to be similar to a diameter of the guide wire.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: April 9, 2024
    Assignee: ExsoMed Corporation
    Inventors: Lloyd P. Champagne, Jozef Zoldos, Larry Ehmke, Michael Zwolinski
  • Publication number: 20230200876
    Abstract: A four corner fusion system can include a curved plate that is more aligned with the natural anatomy of the wrist joint, and/or fewer number of screws (for example, about three or four screws). The system can have a lower profile, resulting in less soft tissue impingement. A surgical tool with a pair of offsetting clamping arms can be used to aid in bone reduction during a wrist fusion procedure.
    Type: Application
    Filed: April 30, 2021
    Publication date: June 29, 2023
    Inventors: Martin Boyer, Kathleen McKeon, Kavi Sachar, Andrew J. Leither, Michael Zwolinski
  • Publication number: 20230072157
    Abstract: A fracture treatment system can include a pair of implants cross-pinned into the medullary canal of a bone, guided by at least one guide wire with at least two diameters. The system allows for more accurate sizing of the length of implants needed to achieve bicortical purchase for enhanced stability, as well as anti-rotation of the fracture site. The more accurate sizing and placement of the cross-pinned implants additionally allow both ends of the implants to recess beneath or be flush with the outer surface of the bone, which can reduce the risk of infection. The guide wire can allow the implants to be inserted using a cannulated technique for easier surgical procedure and better outcome, with the implants having sufficient wall thickness for the desired length to achieve bicortical purchase while keeping the shaft outer diameter of the implant to be similar to a diameter of the guide wire.
    Type: Application
    Filed: September 2, 2022
    Publication date: March 9, 2023
    Inventors: Lloyd P. Champagne, Jozef Zoldos, Larry Ehmke, Michael Zwolinski
  • Publication number: 20230063432
    Abstract: The present invention relates to a crescent or tri-corner shaped orthopedic plate with at least a first and a second end, and generally coextensive top and bottom surfaces joined directly or indirectly by an edge. The plate includes a plurality of fixation holes the first end of the plate and a second end of the plate that receives locking screws and intermediate the two holes, the plate includes a recess that defines a screw hole edge at an angle relative to the top surface of the plate so as to receive and support a screw in the recess. The invention further relates to a method of fusion using the plate and a clamp designed for the method.
    Type: Application
    Filed: July 12, 2022
    Publication date: March 2, 2023
    Inventors: Martin Boyer, Andrew Leither, Kathleen McKeon, Kulvinder Sachar, Michael Zwolinski
  • Patent number: 11413155
    Abstract: The present invention relates to a crescent or tri-corner shaped orthopedic plate with at least a first and a second end, and generally coextensive top and bottom surfaces joined directly or indirectly by an edge. The plate includes a plurality of fixation holes the first end of the plate and a second end of the plate that receives locking screws and intermediate the two holes, the plate includes a recess that defines a screw hole edge at an angle relative to the top surface of the plate so as to receive and support a screw in the recess. The invention further relates to a method of fusion using the plate and a clamp designed for the method.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: August 16, 2022
    Assignee: Exsomed Corporation
    Inventors: Martin Boyer, Andrew Leither, Kathleen McKeon, Kulvinder Sachar, Michael Zwolinski
  • Publication number: 20210282828
    Abstract: A fracture treatment system can include a pair of implants cross-pinned into the medullary canal of a bone, guided by at least one guide wire with at least two diameters. The system allows for more accurate sizing of the length of implants needed to achieve bicortical purchase for enhanced stability, as well as anti-rotation of the fracture site. The more accurate sizing and placement of the cross-pinned implants additionally allow both ends of the implants to recess beneath or be flush with the outer surface of the bone, which can reduce the risk of infection. The guide wire can allow the implants to be inserted using a cannulated technique for easier surgical procedure and better outcome, with the implants having sufficient wall thickness for the desired length to achieve bicortical purchase while keeping the shaft outer diameter of the implant to be similar to a diameter of the guide wire.
    Type: Application
    Filed: March 10, 2021
    Publication date: September 16, 2021
    Inventors: Lloyd P. Champagne, Jozef Zoldos, Larry Ehmke, Michael Zwolinski
  • Publication number: 20190307570
    Abstract: The present invention relates to a crescent or tri-corner shaped orthopedic plate with at least a first and a second end, and generally coextensive top and bottom surfaces joined directly or indirectly by an edge. The plate includes a plurality of fixation holes the first end of the plate and a second end of the plate that receives locking screws and intermediate the two holes, the plate includes a recess that defines a screw hole edge at an angle relative to the top surface of the plate so as to receive and support a screw in the recess. The invention further relates to a method of fusion using the plate and a clamp designed for the method.
    Type: Application
    Filed: April 10, 2019
    Publication date: October 10, 2019
    Inventors: Martin Boyer, Andrew Leither, Kathleen McKeon, Kulvinder Sachar, Michael Zwolinski
  • Patent number: 9597131
    Abstract: This invention provides a calcaneal plate implanted using a sinus tarsi approach and comprises an anterior section having two locking screw holes, an s-shaped posterior facet section having a four locking holes and which rounds toward the bone at both the inferior and superior edges and is reinforced at the superior edge, and a blade shaped posterior portion having three linearly aligned locking holes and terminating in a tapered portion. There is also, a drill guide assembly having a drill guide column inserted through a hole in a targeting guide and locking to one of the locking holes in the plate, and cannulated drill guide sleeves that lock into holes in the targeting guide in a spaced relation whereby when the targeting guide is locked into the plate, the targeting guide can be used as a handle and wherein locking screws can be implanted percutaneously.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: March 21, 2017
    Assignee: Orthohelix Surgical Designs, Inc.
    Inventors: James P. Price, Michael A. Zwolinski, Andrew J. Leither, David B. Kay, Bryan D. Den Hartog, David B. Thordarson, John L. Marsh, Derek S. Lewis
  • Publication number: 20160346022
    Abstract: This invention provides a calcaneal plate implanted using a sinus tarsi approach and comprises an anterior section having two locking screw holes, an s-shaped posterior facet section having a four locking holes and which rounds toward the bone at both the inferior and superior edges and is reinforced at the superior edge, and a blade shaped posterior portion having three linearly aligned locking holes and terminating in a tapered portion. There is also, a drill guide assembly having a drill guide column inserted through a hole in a targeting guide and locking to one of the locking holes in the plate, and cannulated drill guide sleeves that lock into holes in the targeting guide in a spaced relation whereby when the targeting guide is locked into the plate, the targeting guide can be used as a handle and wherein locking screws can be implanted percutaneously.
    Type: Application
    Filed: August 9, 2016
    Publication date: December 1, 2016
    Inventors: James P. Price, Michael A. Zwolinski, Andrew J. Leither, David B. Kay, Bryan D. Den Hartog, David B. Thordarson, John L. Marsh, Derek S. Lewis
  • Patent number: 9414872
    Abstract: This invention provides a calcaneal plate implanted using a sinus tarsi approach and comprises an anterior section having two locking screw holes, an s-shaped posterior facet section having a four locking holes and which rounds toward the bone at both the inferior and superior edges and is reinforced at the superior edge, and a blade shaped posterior portion having three linearly aligned locking holes and terminating in a tapered portion. There is also, a drill guide assembly having a drill guide column inserted through a hole in a targeting guide and locking to one of the locking holes in the plate, and cannulated drill guide sleeves that lock into holes in the targeting guide in a spaced relation whereby when the targeting guide is locked into the plate, the targeting guide can be used as a handle and wherein locking screws can be implanted percutaneously.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: August 16, 2016
    Assignee: Orthohelix Surgical Designs, Inc.
    Inventors: James P. Price, Michael A. Zwolinski, Andrew J. Leither, David B. Kay, Bryan D. Den Hartog, David B. Thordarson, John L. Marsh, Derek S. Lewis
  • Publication number: 20160051299
    Abstract: This invention provides a calcaneal plate implanted using a sinus tarsi approach and comprises an anterior section having two locking screw holes, an s-shaped posterior facet section having a four locking holes and which rounds toward the bone at both the inferior and superior edges and is reinforced at the superior edge, and a blade shaped posterior portion having three linearly aligned locking holes and terminating in a tapered portion. There is also, a drill guide assembly having a drill guide column inserted through a hole in a targeting guide and locking to one of the locking holes in the plate, and cannulated drill guide sleeves that lock into holes in the targeting guide in a spaced relation whereby when the targeting guide is locked into the plate, the targeting guide can be used as a handle and wherein locking screws can be implanted percutaneously.
    Type: Application
    Filed: November 3, 2015
    Publication date: February 25, 2016
    Inventors: James P. Price, Michael A. Zwolinski, Andrew J. Leither, David B. Kay, Bryan D. Den Hartog, David B. Thordarson, John L. Marsh, Derek S. Lewis
  • Patent number: 9204912
    Abstract: This invention provides a calcaneal plate implanted using a sinus tarsi approach and comprises an anterior section having two locking screw holes, an s-shaped posterior facet section having a four locking holes and which rounds toward the bone at both the inferior and superior edges and is reinforced at the superior edge, and a blade shaped posterior portion having three linearly aligned locking holes and terminating in a tapered portion. There is also, a drill guide assembly having a drill guide column inserted through a hole in a targeting guide and locking to one of the locking holes in the plate, and cannulated drill guide sleeves that lock into holes in the targeting guide in a spaced relation whereby when the targeting guide is locked into the plate, the targeting guide can be used as a handle and wherein locking screws can be implanted percutaneously.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: December 8, 2015
    Assignee: ORTHOHELIX SURGICAL DESIGNS, INC.
    Inventors: James P. Price, Michael A. Zwolinski, Andrew J. Leither, David B. Kay, Bryan D. Den Hartog, David B. Thordarson, John L. Marsh, Derek S. Lewis
  • Publication number: 20150164563
    Abstract: The invention comprises an implant having a first end section and a second end section, where the first end has a cancellous thread for implantation in a first section of bone and the second end includes expansion slots and barbs or wings, that that resist movement out of a second section of bone. These anchors expand outwardly when a rigid wire, such as a k-wire is fed through a central cannulation in the implant and either the wire expands in diameter or the cannulation decreases in diameter. The implant also includes a collar intermediate to the first and second section which includes one or more surfaces to allow the first section to be screwed into a first bone section.
    Type: Application
    Filed: February 17, 2015
    Publication date: June 18, 2015
    Applicant: ORTHOHELIX SURGICAL DESIGNS, INC.
    Inventors: Derek S. Lewis, Amanda M. Martin, James P. Price, Michael A. Zwolinski, David B. Kay
  • Patent number: 8998999
    Abstract: The invention comprises an implant having a first end section and a second end section, where the first end has a cancellous thread for implantation in a first section of bone and the second end includes expansion slots and barbs or wings, that that resist movement out of a second section of bone. These anchors expand outwardly when a rigid wire, such as a k-wire is fed through a central cannulation in the implant and either the wire expands in diameter or the cannulation decreases in diameter. The implant also includes a collar intermediate to the first and second section which includes one or more surfaces to allow the first section to be screwed into a first bone section.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: April 7, 2015
    Assignee: Orthohelix Surgical Designs, Inc.
    Inventors: Derek S. Lewis, Amanda M. Martin, James P. Price, Michael A. Zwolinski, David B. Kay