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| Number | Title | Issue Date |
| 4208745 | Vascular prostheses composed of polytetrafluoroethylene and process for their production A vascular prosthesis comprising a tubing of porous polytetrafluoroethylene, the polytetrafluoroethylene tubing having a fibrous structure of nodes and fibers connecting the nodes together and having a structure in which the fibrous structure at the insid... | 06/24/1980 |
| 4193138 | Composite structure vascular prostheses A composite structure vascular prosthesis comprising a porous polytetrafluoroethylene tube in which the pores of the porous polytetrafluoroethylene tube are filled with at least one water-insolubilized water-soluble polymer, and a process for producing th... | 03/18/1980 |
