Patents by Inventor Christian Krettek

Christian Krettek 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: 11357636
    Abstract: The invention relates to a prosthesis for implantation into a living body in the form of a magnetic artificial joint, in particular an artificial shoulder joint, comprising: a) a first prosthesis member comprising a socket member, b) a second prosthesis member comprising a head member, c) one of the socket member and the head member is at least partially composed as a permanent magnet and the other one of the socket member and the head member is at least partially composed of a magnetic material, or the socket member and the head member are both at least partially composed as a permanent magnet, d) the socket member comprises a recess on a surface side to be coupled with the head member, the recess comprising a concavely contoured contact surface, e) the head member comprises a projection on a surface side to be coupled with the socket member, the projection comprising a convexly contoured contact surface, f) the convexly contoured contact surface is adapted to the concavely contoured contact surface, such th
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: June 14, 2022
    Assignee: MEDIZINISCHE HOCHSCHULE HANNOVER
    Inventor: Christian Krettek
  • Publication number: 20210030554
    Abstract: The invention relates to a prosthesis for implantation into a living body in the form of a magnetic artificial joint, in particular an artificial shoulder joint, comprising: a) a first prosthesis member comprising a socket member, b) a second prosthesis member comprising a head member, c) one of the socket member and the head member is at least partially composed as a permanent magnet and the other one of the socket member and the head member is at least partially composed of a magnetic material, or the socket member and the head member are both at least partially composed as a permanent magnet, d) the socket member comprises a recess on a surface side to be coupled with the head member, the recess comprising a concavely contoured contact surface, e) the head member comprises a projection on a surface side to be coupled with the socket member, the projection comprising a convexly contoured contact surface, f) the convexly contoured contact surface is adapted to the concavely contoured contact surface, such th
    Type: Application
    Filed: February 5, 2019
    Publication date: February 4, 2021
    Inventor: Christian KRETTEK
  • Publication number: 20090041826
    Abstract: The present invention relates to a process for producing an implant for medical purposes, to the implant obtainable by the process, and to the bioreactor used for the production of the implant. The implants of the invention can be used as implantable prostheses having essentially the functional characteristics of the following tissues: ligaments and tendons, bone and chondrogenic tissues, e.g. intervertebral discs, and combinations of bone tissue with cartilage tissue, e.g. sections of joints having the cartilaginous surface of a joint surface hacked by bone tissue. According to the invention, a porous matrix material is incubated under cell culture conditions with cells while the matrix is exposed to positive pressure on one side and negative pressure on another side for effective colonization of the matrix.
    Type: Application
    Filed: October 13, 2006
    Publication date: February 12, 2009
    Applicant: MEDIZINISCHE HOCHSCHULE HANNOVER
    Inventors: Michael Jagodzinski, Carl Haasper, Christian Krettek
  • Patent number: 6039742
    Abstract: The alignment device serves for the positioning and insertion of osteosynthetic fasteners, in particular locking screws or bolts, in the base part of an intramedullary nail implanted in a bone, with an alignment bracket detachably connected to the top end of the intramedullary nail, and with a longitudinal alignment bar attached to the bracket by means of a coupling unit, the bar having a first section and a second section. In the first section, the alignment bar is detachably and movably connected to a coupling unit. By way of the coupling unit, the alignment bar is also detachably and pivotably connected to the alignment bracket. The second section of the alignment bar is provided with at least one guide hole serving to permit the positioning of a bore for locking the base of the intramedullary nail in a bone.
    Type: Grant
    Filed: November 3, 1998
    Date of Patent: March 21, 2000
    Assignee: Synthes (U.S.A.)
    Inventors: Christian Krettek, Bernd Konemann, Alexandre Perrier, Peter Senn