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.

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 ...

Johannes F Schlapfer, Markus Fluckiger: Osteosynthetic fastening device. Synthes, Fish & Richardson, May 28, 1996: US05520689 (279 worldwide citation)

An osteosynthetic fastening device, preferably in the form of a pedicle screw or a spinal column hook, has a channel in its upper section for receiving a support rod and a retaining element which clamps the rod in the socket through a spherical contact element.

Johannes F Schlapfer: Anchoring device. Synthes, Davis Hoxie Faithfull & Hapgood, March 2, 1993: US05190543 (278 worldwide citation)

A pedicle screw or hook has a slotted head for receiving a support rod. A support element in the head transverse to the slot provides limited pivotal movement for the support rod.

Johannes F Schlapfer, Robert Frigg, Thomas Amrein, Daniel Recher, Linda Trebing: Osteosynthetic fixation element and manipulation device. Synthes, Fish & Richardson, July 9, 1996: US05534001 (188 worldwide citation)

The osteosynthetic fixation element (10) in the form of a pedicular screw or a vertebral column hook has a lower section (2) that can be anchored into a bone and an upper section (3) connected in the direction of its longitudinal axis (1), that is completely penetrated transversely by a penetration ...

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.

Johannes F Schlapfer, Martin Hess: Connection device. Synthes, Davis Hoxie Faithfull & Hapgood, May 17, 1994: US05312402 (100 worldwide citation)

The connection device (20) for adjustable connection of a first with a second structural element (12, 13), particularly tubes or rods, for a setting device has an external component (21) with a cylindrical hole and two internal components (22) inserted into the hole so that they can be slid axially ...

Johannes F Schlapfer: Hook with screw for treatment of vertebral column deformities. Synthes, Davis Hoxie Faithfull & Hapgood, December 17, 1996: US05584832 (90 worldwide citation)

This hook serves to treat vertebral column deformities. It is comprised of a shaft portion (2) with a longitudinal axis (1) to which a longitudinal support rod (5) can be attached transversely to the longitudinal axis (1), as well as a hook body (3) with a convex posterior side (34) and a concave an ...

Johannes F Schlapfer, Martin Hess: Surgical forceps. April 1, 1997: US05616143 (90 worldwide citation)

Surgical forceps have connecting members onto which working ends are attached in offset fashion, so that they can work together outside the plane of the forceps. One of the working ends is tubular and the other has an angled, U-shaped cross section which receives a portion of the tubular working end ...

Johannes F Schlapfer, Max Aebi: Pedicle hook. Synthes, Davis Hoxie Faithfull & Hapgood, November 23, 1993: US05263954 (20 worldwide citation)

A pedicle hook for use in treatment of the spine has a bifurcated blade in which one of the legs formed by the bifurcation is longer than the other.