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Patent applications and USPTO patent grants for Telegraph and Telephone Corporation.The latest application filed is for "encryption and decryption devices for public-key cryptosystems and recording medium with their processing programs recorded thereon".
Patent | Date |
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Encryption and decryption devices for public-key cryptosystems and recording medium with their processing programs recorded thereon Grant 6,480,605 - Uchiyama , et al. November 12, 2 | 2002-11-12 |
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