1
Johannes F Schlapfer, Martin Hess, Rene Schelker, Ralf Hagmann: Posterior spinal implant. Synthes, Fish & Richardson P C, June 20, 2000: US06077262 (486 worldwide citation)

A spinal screw or hook has a slotted head to receive a support rod. A two-piece rod retainer is provided with an outer ring-like collar locked into the interior of the slotted head and a fastener extending through the collar to contact a support rod in the bottom of the slot.


2
Johannes F Schlapfer, Martin Hess: Osteosynthetic fixation device. Synthes, Fish & Richardson, March 26, 1996: US05501684 (415 worldwide citation)

An osteosynthetic fixation device consists of a fixation element 1 which has a conical head section 11 and an anchoring element 12 abutting it which is for attachment into the bone. The fixation device also consists of a spherically formed, layered, slotted clamping piece 2 which has a conical boreh ...


3
Fridolin Schläpfer, Martin Hess: Device for connecting a longitudinal support with a pedicle screw. Synthes, Pennie & Edmonds, June 19, 2001: US06248105 (329 worldwide citation)

The invention relates to a device for connecting a longitudinal rod with a bone anchoring element, such as a pedicle screw, thereby forming a system for fixation of the spine. The device includes a connecting member having upper and lower ends, a bore hole which is open at least towards the lower en ...


4
Fridolin J Schlapfer, Martin Hess: Bone screw. Synthes, Pennie & Edmonds, July 1, 2003: US06585740 (291 worldwide citation)

The central portion of the screw according to the invention has a series of segments varying in diameter, typically having a segment located near the screw head with a large diameter, a segment located near the front portion with a small diameter, and intermediate segments tapering in the direction ...


5
Thomas Amrein, Martin Hess: Device for connecting a longitudinal bar to a pedicle screw. Synthes, Pennie & Edmonds, April 16, 2002: US06371957 (258 worldwide citation)

The invention relates to a device for connecting a longitudinal bar to a pedicle screw thereby forming a system for fixation of the spine. The device includes a body having an upper end, a lower end, a hole which is open at least towards the bottom and has an axis, and a through hole positioned perp ...


6
Fridolin Schlapfer, Martin Hess: Intervertebral implant. Synthese, Pennie & Edmonds, May 9, 2000: US06059829 (232 worldwide citation)

The present invention related to an implant (1) for an intervertebral space consists of a frame (2) which is closed at the sides but open without restriction at the top and bottom and provided with an anterior lead-in face (3) and a posterior manipulation face (4). The upper (5) and lower boundary ( ...


7
Thomas Amrein, Martin Hess: Device for connecting a longitudinal bar to a pedicle screw. Synthes, Jones Day, April 4, 2006: US07022122 (217 worldwide citation)

The invention is directed to a device for connecting a longitudinal bar to a pedicle screw for fixation of the spine. The device includes a body having an axis, an upper end, a lower end, a hole coaxial with the axis, and a through hole positioned perpendicular to the axis. The device also includes ...


8
Fridolin Schlapfer, Martin Hess: Device for connecting a longitudinal support to a bone anchor. Synthes, Pennie & Edmonds, June 24, 2003: US06582436 (133 worldwide citation)

A device for connecting a longitudinal support to a bone anchor having a rounded head includes a body defining a chamber for receiving the rounded head of the bone anchor and a first channel for receiving the longitudinal support. Further, a first sleeve is slidable over the body for compressing the ...


9
Fridolin J Schläpfer, Martin Hess: Bone fixation device with a rotation joint. Synthes, Pennie & Edmonds, March 2, 2004: US06699249 (129 worldwide citation)

The invention relates to a bone fixation device which includes a pair of bone plates and a longitudinal carrier. The longitudinal carrier can be used to permit the bone plates to telescope with respect to one another, such as in a direction parallel to the longitudinal axis of the vertebral column. ...


10
Johannes F Schlapfer, Martin Hess, Roland Woreth, Peter Tanner, Hans Weigum: Clamp connection for connecting two construction components for a setting device, particularly an osteosynthetic setting device. Synthes, Fish & Richardson, March 12, 1996: US05498264 (100 worldwide citation)

A clamp connection serves to connect two construction components, in particular for an osteo-synthetic fixation device in a structure in which the construction components are off-set from the force axis of the loading force that retains them.