DAVID G LEWALLEN, M.D.
Medical Practice at 1 St, Rochester, MN

2011011, May 12, 2011

Jan 14, 2011

13/007225

Jeff Blaylock - Fort Wayne IN, US
Michael Cook - Claypool IN, US
Ron Donkers - Warsaw IN, US
Scott Dykema - Warsaw IN, US
Maleata Hall - Warsaw IN, US
John Meyers - Columbia City IN, US
Arlen D. Hanssen - Rochester MN, US
David G. Lewallen - Rochester MN, US

ZIMMER, INC. - WARSAW IN

A61F 2/38

623 2015, 623 2035

A femoral augment, or set of augments, for use with a knee joint prosthesis, where the femoral augment includes a main body portion, an aperture formed within the main body portion and extending in a generally distal/proximal direction, and a pair of legs extending outwardly from said main body portion in a generally posterior direction. In the preferred embodiment, the aperture is configured to receive a stem extension implant, and to allow it to pass through. Additionally, the legs of the femoral augment are preferably configured to be seated proximal of a proximal side of a pair of condylar portions of a femoral component of a knee joint prosthesis. The present invention is intended for situations in which the distal portion of the femur is defective, and it provides a method and devices that allow for preservation of healthy peripheral bone, while still providing the necessary augmentation to the distal portion of the femur.

6887278, May 3, 2005

Nov 4, 2002

10/287113

David G. Lewallen - Rochester MN, US

Mayo Foundation for Medical Education and Research - Rochester MN

A61F002/32

623 2211, 623 2317, 623 2324

A prosthetic implant having a fixation stem with varying stiffness is disclosed. The stem comprises an elongated core and segments extending outward from the core. The segments are spaced apart so as to define transverse grooves surrounding the core between adjacent segments. The longitudinal length of the grooves, and the materials used for the core and the segments are selected such that the stiffness of the stem varies from the proximal end to the distal end. Typically, the stiffness of the stem will be lower at the distal end such that the distal end of the stem bears less force when loaded and thereby transfers more load to the proximal end of the stem, which has a higher stiffness. As a result, stress shielding, in which the load bypasses the proximal end of the stem, is minimized and bone resorption adjacent the proximal end of the stem is decreased.

2013026, Oct 3, 2013

Mar 15, 2013

13/836586

Wayne Paprosky - Winfield IL, US
David Lewallen - Rochester MN, US
Steven Stump - Goshen IN, US

Zimmer, Inc. - Warsaw IN

A61F 2/38

623 2033

Tibial prosthesis systems for implantation or use in a knee joint are disclosed. A tibial prosthesis system can include a bearing component, a base component, a shim component, and optionally a spacer component. The shim or spacer component can be inserted between an inferior surface of the bearing component and a superior surface of the base component. The insertion of the shim or spacer component can provide spacing adjustment between the bearing and base components. The shim component can include one or both of a medial edge having a different height than a lateral edge or an anterior edge having a different height than a posterior edge. The differing edge height of the shim component can provide a surgeon with knee joint kinematic insight regarding an angled bone cut before the cut is made, and can allow for sizing of an appropriately permanent prosthesis system using a reduced number of provisional components.

2002008, Jul 4, 2002

Aug 30, 2001

09/943577

David Lewallen - Rochester MN, US
Richard Lovett - Rochester MN, US

B60R021/32

280/735000

An automobile airbag deactivation system is provided to enable emergency services personnel to prevent uninflated airbags from inflating when crash victims are being extricated from crashed automobiles. The system would enable emergency services personnel to deactivate all airbag inflation systems. The airbag deactivation system includes an interrupt switch and a switch control. The interrupt switch is located so as to prevent airbag inflation, such as between the airbag control circuitry and the airbag actuator or between the airbag actuator and the airbag. The switch control includes a device to open the interrupt switch and an access control device. The access control device prevents deactivation of the airbag inflating system by non-emergency personnel. Embodiments of the access control device include restricted electromagnetic band communication between a signal source and a signal transducer. The transducer opens the interrupt switch to deactivate the airbag inflation system. In other embodiments, a mechanical lock is used. Keys to these locks may be made available to emergency services personnel.

2010011, May 6, 2010

Nov 4, 2009

12/612205

David G. Lewallen - Rochester MN, US

A61B 17/08

606151

Methods and devices are disclosed for the attachment of a soft tissue structure (e.g., tendon or ligament) to bone or a prosthetic implant. In one form, the device includes a clamp comprising a porous metallic material. The clamp includes a convex tissue engaging surface. The device also includes a fastener for compressing the soft tissue between the tissue engaging surface and the bone or the prosthetic implant. The porous metallic material allows the ingrowth of soft tissue into the clamp. In another form, the device includes a second clamp comprising a porous metallic material. The second clamp including a first surface, a concave tissue engaging surface opposite the first surface, and a throughhole extending from the first surface to the concave tissue engaging surface. The second clamp is placed adjacent the bone, the soft tissue is placed adjacent the second clamp, and the first clamp is placed adjacent the soft tissue. A fastener is inserted through the throughhole of the first clamp, through the soft tissue, through the throughhole of the second clamp and into the bone such that the soft tissue is compressed between the convex tissue engaging surface of the first clamp and the concave tissue engaging surface of the second clamp.

2014008, Mar 20, 2014

Nov 20, 2013

14/085040

David Lewallen - Rochester MN, US

Zimmer, LLC. - Warsaw IN

A61F 2/30

623 2344

A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.

2003006, Apr 3, 2003

Aug 22, 2002

10/225774

Arlen Hanssen - Rochester MN, US
David Lewallen - Rochester MN, US

A61F002/28, A61F002/32, A61F002/38

623/020320, 623/023230, 623/022390, 623/016110

A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of the cavity in the end of the bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the channel by an adhesive. The stem of the prosthesis beyond the channel may be cemented or uncemented. The support structure may have an approximately funnel shape. The support structure may be a hollow porous cylindrical sleeve. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining a channel between the pair of components. The support structure may comprise a plurality of pedestals secured to the inner surface of the cavity of the bone.

2011006, Mar 17, 2011

Nov 15, 2010

12/946132

Arlen D. Hanssen - Rochester MN, US
David G. Lewallen - Rochester MN, US

ZIMMER, INC. - WARSAW IN

A61F 2/30

623 2346

A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.

2010014, Jun 10, 2010

Feb 9, 2010

12/702861

Jeff Blaylock - Fort Wayne IN, US
Michael Cook - Claypool IN, US
Ron Donkers - Warsaw IN, US
Scott Dykema - Warsaw IN, US
Maleata Hall - Warsaw IN, US
John Meyers - Columbia City IN, US
Arlen D. Hanssen - Rochester MN, US
David G. Lewallen - Rochester MN, US

ZIMMER, INC. - Warsaw IN

A61F 2/28

623 1611

A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.

6895973, May 24, 2005

Aug 28, 2003

10/650266

David G. Lewallen - Rochester MN, US

Mayo Foundation for Medical Education and Research - Rochester MN

A61B019/00

128899

A permanent magnet housed in a porous metal container is implanted in the pelvis of a subject and a second permanent magnet is attached to a supporting structure, such as the seat of a wheelchair. The opposing force produced by the two magnets when the subject rests on the supporting structure reduces the compressive force acting on the tissues therebetween.