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
James D Ralph, Stephen Tatar: Polyaxial pedicle screw having a threaded and tapered compression locking mechanism. Fastenetix, Morrison & Foerster, April 16, 2002: USRE037665 (1 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 ...


3
James D Ralph, Thomas J Errico, Joseph P Errico: Polyaxial pedicle screw having a threaded and tapered compression locking mechanism. Warsaw Orthopedic, July 12, 2011: USRE042545

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 ...


4
James D Ralph, Stephen Tatar, Joseph P Errico, Thomas J Errico: Polyaxial pedicle screw having a threaded and tapered compression locking mechanism. Fastenetix, Carter DeLuca Farrell & Schmidt, May 2, 2006: USRE039089

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 ...