Hiroshi Miyauchi

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Key recovery condition encryption and decryption apparatuses
- Patent number 6,272,225
- Issue date Aug 7, 2001
- NEC Corporation
- Hiroshi Miyauchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key recovery system and key recovery method
- Patent number 6,266,421
- Issue date Jul 24, 2001
- Hitachi, Ltd.
- Seiichi Domyo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key recovery system
- Patent number 6,185,308
- Issue date Feb 6, 2001
- Fujitsu Limited
- Hiroyuki Ando
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Encryption key processing system to be incorporated into data recov...
- Patent number 6,169,803
- Issue date Jan 2, 2001
- NEC Corporation
- Kazue Sako
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Electronic signature method and apparatus
- Patent number 5,689,567
- Issue date Nov 18, 1997
- NEC Corporation
- Hiroshi Miyauchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signature verification apparatus capable of obtaining information r...
- Patent number 5,661,805
- Issue date Aug 26, 1997
- NEC Corporation
- Hiroshi Miyauchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Copyright protection system and method thereof
- Publication number 20020154772
- Publication date Oct 24, 2002
- Takuya Morishita
- G06 - COMPUTING CALCULATING COUNTING