Number | Name | Date | Kind |
---|---|---|---|
3781829 | Singh | Dec 1973 | |
4408337 | Pham Van Cang | Oct 1983 | |
4538268 | Pham Van Cang | Aug 1985 | |
4554663 | Pham Van Cang | Nov 1985 | |
4559553 | Van Cang | Dec 1985 |
Entry |
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N. H. Burkies and J. G. Wade, IEEE Transactions on Broadcasting, vol. BC-26, No. 3, Sep. 1980, pp. 82-90. |