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| Number | Title | Issue Date |
| 4663230 | Carbon fibrils, method for producing same and compositions containing same This invention concerns an essentially cylindrical discrete carbon fibril characterized by a substantially constant diameter between about 3.5 and about 70 nanometers, e.g. between about 7 and 25 nanometers, length greater than about 102 times ... | 05/05/1987 |