1
Hans I Wallsten: Prosthesis comprising an expansible or contractile tubular body. Shepherd Patents, Burns Doane Swecker & Mathis, April 7, 1987: US04655771 (1602 worldwide citation)

A prosthesis for transluminal implantation comprising a flexible tubular body which has a diameter that is variable by axial movement of the ends of the body relative to each other and which is composed of several individual rigid but flexible thread elements each of which extends in helix configura ...


2
Hans I Wallsten: Prosthesis comprising an expansible or contractile tubular body. Shepherd Patents, Burns Doane Swecker & Mathis, September 4, 1990: US04954126 (820 worldwide citation)

A prosthesis for transluminal implantation comprising a flexible tubular body which has a diameter that is variable by axial movement of the ends of the body relative to each other and which is composed of several individual rigid but flexible thread elements each of which extends in helix configura ...