1
Thomas P Hedman, John P Kostuik, Geoffrey R Fernie, Brian E Maki: Artificial spinal disc. Health & Research Services, Rogers Bereskin & Parr, July 26, 1988: US04759769 (827 worldwide citation)

An artificial disc for a human spine. The disc has upper and lower members hinged together at their rear portions and biased apart at their fronts by stiff coil springs. Rear stop surfaces limit the opening movement of the members. Vertically projecting tabs at the front and side of each member are ...


2
Hedman Thomas P, Fernie Geoffrey R, Kostuik John P, Maki Brian E: Artificial spinal disc.. Health & Research Services, September 14, 1988: EP0282161-A1 (54 worldwide citation)

An artificial disc for a human spine has upper (26) and lower (28) members hinged together at their rear portions and biased apart at their fronts by stiff coil springs (72). Rear stop surfaces (103) limit the opening movement of the members. Vertically projecting tabs (46,64) at the front and side ...


3
Wu Tai Wing: Bilirubin degrading enzymes.. Health & Research Services, June 14, 1989: EP0320095-A2 (3 worldwide citation)

A bilirubin-degrading enzyme preparation obtained from higher plant sources of the genus Citrus is described. Exemplary sources include lemon, lime, orange, tangerine, tangelo, and grapefruit. Assay compositions, analytical elements and methods for using the enzyme are also described.