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| Number | Title | Issue Date |
| 4217665 | Prosthesis for use in valvuloplasty A prosthesis for use in valvuloplasty. The prosthesis is formed as a linear educer made of a material which is compatible with implantation and which in its direction of length is incompressible and inextensible but in the direction of its width is suffici... | 08/19/1980 |
