1
James D Ralph, Stephen Tatar: Polyaxial pedicle screw having a threaded and tapered compression locking mechanism. Fastenetix, Joseph P Errico Esq, March 16, 1999: US05882350 (383 worldwide citation)

A polyaxial orthopedic device for use with rod implant apparatus includes a screw having a curvate head, a two-piece interlocking coupling element which mounts about the curvate head, and a rod receiving cylindrical body member having a tapered socket into which both the screw and the interlocking c ...


2
Stephen Tatar: Polyaxial pedicle screw having a loosely coupled locking cap. Bones Consulting, Joseph P Errico Esq, September 5, 2000: US06113601 (365 worldwide citation)

A polyaxial pedicle screw for use with rod implant apparatus includes a rod receiving body, a screw having a curvate head, a compression element, and a means for loosely and reversibly maintaining a coupled relationship between the compression element and the screw head during angulation thereof rel ...


3
James D Ralph, Stephen Tatar: Polyaxial pedicle screw having a rotating locking element. Third Millennium Engineering, Joseph P Errico, Timothy J Bortree, September 17, 2002: US06451021 (304 worldwide citation)

A screw and coupling element assembly for use with an orthopedic rod implantation apparatus includes a screw that has a head and a shaft that extends from the head, a coupling element that has a seat within which the head can be seated such that the shaft protrudes from the coupling element, and a l ...


4
James D Ralph, Stephen Tatar: Intervertebral spacer device. Third Millennium Engineering, Joseph P Errico Esq, November 23, 1999: US05989291 (294 worldwide citation)

An intervertebral spacer device having a pair of opposing plates for seating against opposing vertebral bone surfaces, separated by at least one spring mechanism. The preferred spring mechanism is a belleville washer. In a first embodiment there are two belleville washers which are oriented in oppos ...


5
Stephen Tatar: Polyaxial pedicle screw having a rod clamping split ferrule coupling element. Bones Consulting, Joseph P Errico Esq, June 8, 1999: US05910142 (250 worldwide citation)

A polyaxial pedicle screw device for use with rod implant apparatus, which utilizes a rod mounted ferrule, includes a screw having a curvate head and a rod receiving body. The body has a rod receiving channel and an axial bore into which the head of the screw is inserted. The interior surface of the ...


6
James D Ralph, Stephen Tatar: Longitudinal plate assembly having an adjustable length. Third Millennium Engineering, Joseph P Errico, Timothy J Bortree, June 11, 2002: US06402756 (227 worldwide citation)

An orthopedic device including a longitudinal plate assembly having an adjustable length and two ends. Each of the ends includes a feature that can be used to couple the end to a body structure, such as, for example, a vertebral bone. Preferably, the assembly includes two longitudinal plates that ca ...


7
James D Ralph, Stephen Tatar: Polyaxial pedicle screw having a rotating locking element. K2 Medical, Carter DeLuca Farrell & Schmidt, January 11, 2005: US06840940 (210 worldwide citation)

A screw and coupling element assembly for use with an orthopedic rod implantation apparatus includes a screw with a head and a shaft extending from the head, a coupling element with a seat within which the head is seatable such that the shaft protrudes from the coupling element, and a locking elemen ...


8
Joseph P Errico, Thomas J Errico, James D Ralph, Stephen Tatar: Polyaxial pedicle screw having a compression locking rod gripping mechanism. Spinal Concepts, Conley Rose & Tayon P C, September 22, 1998: US05810819 (186 worldwide citation)

A polyaxial orthopedic device for use with rod implant apparatus includes a screw having a curvate ball top, a polyaxial head member having a socket into which the head of the screw is initially polyaxially nested, a vertical slot which renders the socket compressible, and a horizontal through hole ...


9
James D Ralph, Stephen Tatar, Joseph P Errico: Intervertebral spacer device having arch shaped spring elements. Spinecore, Joseph P Errico Esq, Timothy J Bortree Esq, January 6, 2004: US06673113 (184 worldwide citation)

An intervertebral spacer device having a pair of opposing plates for seating against opposing vertebral bone surfaces, separated by at least one spring mechanism. The preferred spring mechanism is an arched strip spring. In a first embodiment there are multiple springs positioned independently about ...


10
Joseph P Errico, Thomas J Errico, James D Ralph, Stephen Tatar: Polyaxial pedicle screw having a compression locking rod gripping mechanism. Spinal Concepts, Conley Rose & Tayon PC, December 7, 1999: US05997539 (179 worldwide citation)

A polyaxial orthopedic device for use with rod implant apparatus includes a screw having a curvate ball top, a polyaxial head member having a socket into which the head of the screw is initially polyaxially nested, a vertical slot which renders the socket compressible, and a horizontal through hole ...