Patents by Inventor George D. Letson

George D. Letson 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).

  • Modular stem extension
    Patent number: 9814583
    Abstract: The modular stem component may include a shaft portion, a head, and a sleeve. The shaft portion is configured for receipt within the intramedullary canal of a bone and the head is configured to receive another component of a modular prosthetic system, such as a femoral neck, thereon. In one exemplary embodiment, the head extends radially around at least a portion of the stem and includes a rib defining a flange extending therefrom. The sleeve, which is formed as an independent part of the modular stem component and is made at least partially of a highly porous biomaterial, includes opposing ends and has a bore extending therethrough. The bore is configured to facilitate sliding receipt of the sleeve on the head.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: November 14, 2017
    Assignee: Zimmer, Inc.
    Inventors: Dennis R. Aquilo, John E. Meyers, Douglas G. Branscome, Jack D. Jennings, Abraham P. Habegger, Alex P. Stoller, Kelly A. Timmons, Nathan Chastain, Marvin Figueroa, Clarence M. Panchison, Gary D. Bos, Ernest U. Conrad, Kimberly Les, Herrn Neumann, Mary I. O'Connor, Peter S. Walker, George D. Letson, Thomas P. Vail
  • Constrained prosthetic knee with rotating bearing
    Patent number: 8888857
    Abstract: A constrained prosthetic knee having a modular hinge post and a rotating bearing. A cannulated hinge post is rotatably connected to the femoral component of the knee prosthesis so that a hinge post extension may be anteriorly positioned through the hinge post and into the tibial component of the knee prosthesis, after positioning of the femoral component in the femur and the tibial component in the tibia. The hinge post is preassembled to the femoral component so that such assembly is not required during the implantation procedure. A meniscal component forming the rotating bearing of the knee prosthesis is packaged together with the hinge post extension so that the appropriate hinge post extension is readily available. The meniscal component includes a mechanism for preventing lift off of the meniscal component from the tibial component, while allowing rotation of the meniscal component relative to the tibial component.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: November 18, 2014
    Assignee: Zimmer, Inc.
    Inventors: John E. Meyers, George D. Letson, Russell Windsor, Vincent A. Webster, Bill N. Sisk, Bill H. Haywood, Adam M. Griner, Michael Cook, Rodney L. Bays, Jerry L. Aikins, Marvin Figueroa, Peter S. Walker
  • CONSTRAINED PROSTHETIC KNEE WITH ROTATING BEARING
    Publication number: 20120330430
    Abstract: A constrained prosthetic knee having a modular hinge post and a rotating bearing. A cannulated hinge post is rotatably connected to the femoral component of the knee prosthesis so that a hinge post extension may be anteriorly positioned through the hinge post and into the tibial component of the knee prosthesis, after positioning of the femoral component in the femur and the tibial component in the tibia. The hinge post is preassembled to the femoral component so that such assembly is not required during the implantation procedure. A meniscal component forming the rotating bearing of the knee prosthesis is packaged together with the hinge post extension so that the appropriate hinge post extension is readily available. The meniscal component includes a mechanism for preventing lift off of the meniscal component from the tibial component, while allowing rotation of the meniscal component relative to the tibial component.
    Type: Application
    Filed: September 5, 2012
    Publication date: December 27, 2012
    Inventors: John E. Meyers, George D. Letson, Russell Windsor, Vincent A. Webster, Bill N. Sisk, Bill H. Haywood, Adam Griner, Michael Cook, Rodney L. Bays, Jerry L. Aikins, Marvin Figueroa, Peter S. Walker
  • MODULAR STEM EXTENSION
    Publication number: 20090222007
    Abstract: The modular stem component may include a shaft portion, a head, and a sleeve. The shaft portion is configured for receipt within the intramedullary canal of a bone and the head is configured to receive another component of a modular prosthetic system, such as a femoral neck, thereon. In one exemplary embodiment, the head extends radially around at least a portion of the stem and includes a rib defining a flange extending therefrom. The sleeve, which is formed as an independent part of the modular stem component and is made at least partially of a highly porous biomaterial, includes opposing ends and has a bore extending therethrough. The bore is configured to facilitate sliding receipt of the sleeve on the head.
    Type: Application
    Filed: May 8, 2007
    Publication date: September 3, 2009
    Applicant: ZIMMER, INC.
    Inventors: Dennis R Aquilo, John E. Meyers, Douglas G. Branscome, Jack D. Jennings, Abraham P. Habegger, Alex P. Stoller, Kelly A. Timmons, Nathan Chastain, Marvin Figueroa, Clarence M. Panchison, Gary D. Bos, Ernest U. Conrad, Kimberly Les, Herrn Neumann, Mary I. O'Conner, Peter S. Walker, George D. Letson, Thomas P. Vail
  • Constrained prosthetic knee with rotating bearing
    Patent number: RE44476
    Abstract: A constrained prosthetic knee having a modular hinge post and a rotating bearing. A cannulated hinge post is rotatably connected to the femoral component of the knee prosthesis so that a hinge post extension may be anteriorly positioned through the hinge post and into the tibial component of the knee prosthesis, after positioning of the femoral component in the femur and the tibial component in the tibia. The hinge post is preassembled to the femoral component so that such assembly is not required during the implantation procedure. A meniscal component forming the rotating bearing of the knee prosthesis is packaged together with the hinge post extension so that the appropriate hinge post extension is readily available.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: September 3, 2013
    Assignee: Zimmer, Inc.
    Inventors: John E. Meyers, Jerry L. Aikins, Rodney L. Bays, Michael Cook, Marvin Figueroa, Adam M. Griner, Bill H. Haywood, Bill N. Sisk, Vincent A. Webster, George D Letson, Peter S. Walker, Russell Windsor