Hiroyoshi Tsuchiya

Person

Kawasaki, JP

People

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
Encrypted data recovery method using split storage key and system t...
- Patent number 6,118,874
- Issue date Sep 12, 2000
- Hitachi, Ltd.
- Eiji Okamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for converting a line density of a bi-level im...
- Patent number 5,229,868
- Issue date Jul 20, 1993
- Matsushita Electric Industrial Co., Ltd.
- Yoshimitsu Kanno
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image signal processing apparatus for bar code image signal
- Patent number 5,134,272
- Issue date Jul 28, 1992
- Matsushita Electric Industrial Co., Ltd.
- Hiroyoshi Tsuchiya
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Bi-level image display signal processing apparatus
- Patent number 4,924,322
- Issue date May 8, 1990
- Matsushita Electric Industrial Co., Ltd.
- Toshiharu Kurosawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Bi-level image display signal processing apparatus
- Patent number 4,891,710
- Issue date Jan 2, 1990
- Matsushita Electric Industrial Co., Ltd.
- Katsuo Nakazato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for processing image signal
- Patent number 4,890,167
- Issue date Dec 26, 1989
- Matsushita Electric Industrial Co., Ltd.
- Katsuo Nakazato
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Apparatus for processing image signal
- Patent number 4,692,811
- Issue date Sep 8, 1987
- Matsushita Electric Industrial Co., Ltd.
- Hiroyoshi Tsuchiya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image processor
- Patent number 4,586,089
- Issue date Apr 29, 1986
- Matsushita Electric Industrial Co., Ltd.
- Katsuo Nakazato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for processing image signal
- Patent number 4,551,768
- Issue date Nov 5, 1985
- Matsushita Electric Industrial Co., Ltd.
- Hiroyoshi Tsuchiya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for processing video signals
- Patent number 4,538,184
- Issue date Aug 27, 1985
- Matsushita Electric Industrial Company, Limited
- Hirotaka Otsuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Variable density scanner
- Patent number 4,502,081
- Issue date Feb 26, 1985
- Matsushita Electric Industrial Co., Ltd.
- Hirotaka Otsuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of and a system for color separation
- Patent number 4,180,330
- Issue date Dec 25, 1979
- Matsushita Electric Industrial Co., Ltd.
- Hiroaki Kotera
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for public key cryptosystem
- Publication number 20030163701
- Publication date Aug 28, 2003
- Hitachi, Inc.
- Yasushi Ochi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Hiroyoshi Tsuchiya

Person

Patents Grantslast 30 patents

Key recovery condition encryption and decryption apparatuses

Key recovery system and key recovery method

Key recovery system

Encrypted data recovery method using split storage key and system t...

Method and apparatus for converting a line density of a bi-level im...

Image signal processing apparatus for bar code image signal

Bi-level image display signal processing apparatus

Bi-level image display signal processing apparatus

Apparatus for processing image signal

Apparatus for processing image signal

Image processor

Method and apparatus for processing image signal

Method and apparatus for processing video signals

Variable density scanner

Method of and a system for color separation

Patents Applicationslast 30 patents

Method and apparatus for public key cryptosystem